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Best Split King Mattresses (2024) – Expert Tested

If you’re going to share a King-size mattress, you may as well ensure that your side feels just the way you like it. This kind of customizability is possible with a split King — traditionally, two Twin XL mattresses positioned side by side. Because the sides of the bed are distinct, you’re free to have a softer or firmer sleep space than your partner’s. If you have an adjustable bed frame, you’ll also be able to move your side into new positions independently. 

What makes a great Split King mattress? Awesome edge support, a few different firmness options to choose from, and that crucial balance of softness and spine-aligning features. Informed by our testing, I’ve gathered the best Split King beds around for this list. 

Our Top Pick for The Best Split King Mattress

The Saatva Classic is our top pick for the best split king bed due to its unmatched edge support, customizable firmness options, and pressure relief.

Best Split King Mattresses

Watch Our Video Review of the Best Split King Mattresses

Saatva Mattress Nectar Mattress Helix Midnight Mattress DreamCloud Original Mattress Nolah Evolution Hybrid Mattress Bear Elite Hybrid Mattress Brooklyn Bedding Aurora Luxe Mattress Titan Plus
Saatva Mattress Nectar Mattress Helix Midnight Mattress DreamCloud Original Mattress Nolah Evolution Hybrid Mattress Bear Elite Hybrid Mattress Brooklyn Bedding Aurora Luxe Mattress Titan Plus
Rating
4.8
4.7
4.5
4.6
4.8
4.5
4.7
4.7
Firmness Multiple firmness options Medium-firm: 6.5/10 Medium-firm: 6/10 Medium-firm: 6.5/10 Multiple firmness options Medium-firm: 6/10 Multiple firmness options Firm: 7.5/10
Material Innerspring Foam Hybrid Hybrid Hybrid Hybrid Hybrid Hybrid
Cooling
Warranty Lifetime warranty Lifetime warranty 10-year warranty Lifetime warranty Lifetime warranty Lifetime Warranty 10-year warranty 10-year warranty
Shipping Free white glove delivery Free shipping Free shipping Free shipping Free shipping Free shipping Free shipping Free shipping
Trial Period 365 nights 365 nights 100 nights 365 nights 120 nights 120 nights 120 nights 120 nights
Best For Back Sleepers, Stomach Sleepers, Back Pain, Hot Sleepers, Seniors Back Sleepers, Side Sleepers, Hip Pain, Joint Pain Couples, Back Sleepers, Side Sleepers Back Sleepers, Hot Sleepers, Seniors Side Sleepers, Back Sleepers, Hip Pain, Seniors Back Sleepers, Stomach Sleepers, Hot Sleepers, Hip Pain, Seniors Hot Sleepers, Back Pain, Side Sleepers Back Sleepers, Stomach Sleepers, Back Pain, Hip Pain, Seniors

Sleep Advisor’s Testing Methodology

At Sleep Advisor, our mattress reviews are based on findings from in-person tests that allow us to have a genuine understanding of how the mattress feels and performs.

For this roundup, we focused on the best mattresses for those looking for a split king bed. We took several factors into account when devising our list, including different sleeping positions, cooling elements, pressure relief, motion isolation, edge support, and more.

Read our full testing methodology here.

Methodology Image- Sleep Advisor
I love testing mattresses in the Sleep Advisor testing facility.

Saatva Classic – Editor’s Pick

Editor’s Pick

Saatva Mattress

Saatva Classic Mattress in Sleep Advisor

Coil-on-coil structure gives this elevated innerspring bed a luxurious feel and versatility.

Score 4.2/5
Read Saatva Mattress Review
CHECK PRICE

Material

Innerspring

Trial Period

365 nights

Shipping Method

Free white glove delivery

Firmness

Multiple firmness options

Warranty

Lifetime warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
Editor’s Pick

Saatva Mattress

Saatva Classic Mattress in Sleep Advisor

Coil-on-coil structure gives this elevated innerspring bed a luxurious feel and versatility.

Score 4.2/5
Read Saatva Mattress Review

Material

Innerspring

Warranty

Lifetime warranty

Firmness

Multiple firmness options

Shipping Method

Free white glove delivery

Trial Period

365 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
Saatva Classic Mattress in Sleep Advisor
Editor’s Pick

Saatva Mattress

Coil-on-coil structure gives this elevated innerspring bed a luxurious feel and versatility.

Score 4.2/5
Read Saatva Mattress Review

Material

Innerspring

Firmness

Multiple firmness options

Trial Period

365 nights

Warranty

Lifetime warranty

Shipping Method

Free white glove delivery

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review

Why the Saatva Classic Earned Editor’s Pick

Saatva marries luxury and value in all their mattresses, including their flagship Classic model. It’s plenty customizable for couples looking for the perfect split king mattress, with two different heights and three firmnesses to choose from. (Please note, however, that only the 11.5-inch height is compatible with an adjustable bed frame.) 

The Classic excels in responsiveness, pressure relief, and support, while also featuring strong edges so sleepers can make use of the bed’s full surface area. Tack on generous policies and a long-lasting structure, and it’s no surprise that the Saatva Classic earned the title of the best split king bed.

Saatva Mattress interior
The construction of the Saatva Classic.

What’s the Saatva Classic Made Of?

The Saatva Classic is available in two heights (11.5 and 14.5 inches) and three firmnesses (Plush Soft, Luxury Firm, and Firm).

Inside the Saatva

  • Euro Pillow Top. Plush foams cushion you all over while quilting in the center keeps the lower back elevated.
  • Lumbar Crown. A crest of foam targets the lumbar area of the back for optimum support and pressure relief.
  • First Coil Layer. Individually wrapped coils are zoned to balance lift and give in all the proper places.
  • Spinal Wire. In between the two coil units is a bracing wire that promotes proper spinal alignment.
  • Second Coil Layer. Traditional interconnected coils add to the bed’s durability.
  • Perimeter Foam Rails. The sides of the mattress are reinforced with a tough foam frame to prevent sagging.

My Take: The Saatva Classic delivers a luxurious sleep experience with enough features to satisfy any customer seeking a high-quality, comfortable bed. The two coil units in this mattress amp up its support and durability, allowing it to last long without any sagging.

What I Liked

  • Something for everyone – With two height and three firmness options, it’s easy to tailor the Saatva Classic to your tastes. If you’re choosing a Split King to cater to your and your partner’s differing preferences, you can even order two Twin XLs in different firmnesses.
  • White glove delivery – Saatva offers free white glove delivery with all their mattresses. They’ll send a team of workers to set up your mattress—and take away your old one if need be.

Potential Drawbacks

  • Returns cost extra – Despite Saatva offering premium delivery, if you’re not satisfied with your purchase, you’ll have to pay to send it back. Returns will run you about $99, so take care if you like to try before you buy.
  • Could isolate motion better – The Saatva Classic is pretty bouncy; I noticed it definitely didn’t isolate motion as well as an all-foam bed. Having a Split King should mostly mitigate this problem, though.

Customer Reviews of the Saatva Classic

The Saatva Classic rates 4.8 stars out of 5 on Saatva’s website. One negative aspect customers found with the Saatva Classic mattress is that it may feel too firm for some users, while a notable advantage is its high-quality materials, providing durability and support.

Interested in more information? Check out our full Saatva Classic review, or browse our list of the best mattresses available.

Nectar – Best Affordable Split King Mattress

Best Affordable Split King Mattress

Nectar Mattress

Nectar Mattress

Nectar offers the deeper hug of a traditional memory foam bed but with updated cooling and a Forever warranty.

Score 4.0/5
Read Nectar Mattress Review
CHECK PRICE

Material

Foam

Trial Period

365 nights

Shipping Method

Free shipping

Firmness

Medium-firm: 6.5/10

Warranty

Lifetime warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Joint Pain
This bed is perfect for anyone suffering from joint pain.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Best Affordable Split King Mattress

Nectar Mattress

Nectar Mattress

Nectar offers the deeper hug of a traditional memory foam bed but with updated cooling and a Forever warranty.

Score 4.0/5
Read Nectar Mattress Review

Material

Foam

Warranty

Lifetime warranty

Firmness

Medium-firm: 6.5/10

Shipping Method

Free shipping

Trial Period

365 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Joint Pain
This bed is perfect for anyone suffering from joint pain.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Nectar Mattress
Best Affordable Split King Mattress

Nectar Mattress

Nectar offers the deeper hug of a traditional memory foam bed but with updated cooling and a Forever warranty.

Score 4.0/5
Read Nectar Mattress Review

Material

Foam

Firmness

Medium-firm: 6.5/10

Trial Period

365 nights

Warranty

Lifetime warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Joint Pain
This bed is perfect for anyone suffering from joint pain.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review

Why the Nectar Earned Best Affordable Split King Mattress

Nectar is rightfully considered one of the first online mattress pioneers. Their original model is a mainstay on the bed-in-a-box market, but even so, they haven’t let the design grow stagnant. Instead, they’ve updated it multiple times to incorporate feedback and new features, all while preserving their commitment to affordability.

The Nectar’s reliable performance and welcoming price point make it a wonderful option for a reasonably priced split king bed. As Emma, one of our expert mattress reviewers put it: “It’s truly a luxury feel at a lower cost.”

Testing the layers and construction of the nectar mattress

What’s the Nectar Made Of?

The Nectar mattress is a 12-inch-high memory foam bed with five layers, including the top and bottom cover. 

Inside the Nectar

  • Layer 1 – Cover. Polyethylene fibers make for a breathable cooling cover.
  • Layer 2 – Gel Memory Foam (2 inches). This memory foam should mold to your body and provide just enough comfortable sinkage while the gel within it prevents heat retention.
  • Layer 3 – Dynamic Response Foam (3 inches). This layer plays a role in both support and motion isolation, acting as a transitional layer between the top of the bed and the base layer.
  • Layer 4 – ActiveSupport Base Foam (7 inches). A dense foam layer creates the foundation for the mattress.
  • Layer 5 – Lower Cover. The bottom cover keeps the layers of the mattress in place and prevents unwanted slipping.

My Take: I think the Nectar is great for all-foam fans who love to sink into the comfy layers of their bed. This bed offers delightful pressure relief at a budget-friendly price, so your joints and your wallet can benefit.

What I Liked

  • Foam that pleases back and side sleepers – “I mostly sleep on my stomach but am trying to transition to my back. I’ve noticed it’s been easier to fall asleep on my back with the Nectar,” said Sleep Advisor’s editor, Jill. But even as the Nectar’s foams provide the stability that back sleepers crave, they also cozily cushion the hips and shoulders if you sleep on your side. During my own testing experience, I also thought the Nectar delivered stellar pressure relief.
  • Great motion isolation – Nectar knocks it out of the park in terms of motion isolation. Both Emma and Jill tested this bed with someone lying next to them and found that it capably absorbed movement. If you sleep next to a partner, you likely won’t be able to feel their fidgeting during the night.

Potential Drawbacks

  • It’s not springy – Given its all-foam design, I noticed that there isn’t a lot of bounce to the Nectar. Emma agreed with me, saying, “If you would rather sleep on the bed rather than sinking into the bed, this one might not be up your alley.”
  • It could be cooler – “[The Nectar] didn’t provide as much cooling as we hoped, [which is] standard for beds without innersprings,” said Jill. “But it’s still something to keep in mind if you don’t have air conditioning.”

Customer Reviews of the Nectar Mattress

With thousands of reviews on Nectar’s website, the Nectar mattress has an average 4.8 out of 5 stars. One common customer complaint about the Nectar mattress is its longer-than-average break-in period, while many customers praise its excellent value and comfort once fully settled.

Want to learn more? Read our full Nectar mattress review, or explore our list of the best cheap mattresses.

Helix Midnight – Best Split King Mattress for Side Sleepers

Best Split King Mattress for Side Sleepers

Helix Midnight Mattress

Helix Midnight Mattress

Part of Helix’s core line of mattresses, the Midnight has a hybrid construction that’s particularly suited to back and side sleepers.

Score 4.0/5
Read Helix Midnight Mattress Review
CHECK PRICE

Material

Hybrid

Trial Period

100 nights

Shipping Method

Free shipping

Firmness

Medium-firm: 6/10

Warranty

10-year warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Couples
This bed has great motion isolation so you will not feel your partner tossing and turning at night.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5
Watch Our Video Review
Best Split King Mattress for Side Sleepers

Helix Midnight Mattress

Helix Midnight Mattress

Part of Helix’s core line of mattresses, the Midnight has a hybrid construction that’s particularly suited to back and side sleepers.

Score 4.0/5
Read Helix Midnight Mattress Review

Material

Hybrid

Warranty

10-year warranty

Firmness

Medium-firm: 6/10

Shipping Method

Free shipping

Trial Period

100 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Couples
This bed has great motion isolation so you will not feel your partner tossing and turning at night.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5
Watch Our Video Review
Helix Midnight Mattress
Best Split King Mattress for Side Sleepers

Helix Midnight Mattress

Part of Helix’s core line of mattresses, the Midnight has a hybrid construction that’s particularly suited to back and side sleepers.

Score 4.0/5
Read Helix Midnight Mattress Review

Material

Hybrid

Firmness

Medium-firm: 6/10

Trial Period

100 nights

Warranty

10-year warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Couples
This bed has great motion isolation so you will not feel your partner tossing and turning at night.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5
Watch Our Video Review

Why the Helix Midnight Earned Best Split King Mattress for Side Sleepers

The Helix Midnight is a medium-firm hybrid mattress built to accommodate a variety of sleepers, but it works especially well for side sleepers because it boasts soft, pressure-relieving foams above its strong coils. This combination cushions problem areas while keeping you lifted and properly aligned. 

Though Helix doesn’t offer the Midnight in a Split King option, you can easily make one by buying two Twin XL mattresses and pushing them together. Co-sleepers should also appreciate the breathability and bounciness that comes from the hybrid’s coils.

Helix Midnight mattress side view
The Helix Midnight in our testing studio.

What’s the Helix Midnight Made Of?

The Helix Midnight is 11.5 inches tall with six total layers. All foams used in its construction are CertiPUR-US® certified.

Inside the Helix Midnight

  • Layer 1 – Soft Touch Cover. A stretchy, comfortable sleep surface. Upgrade to a cooling GlacioTex™ cover for an added fee.
  • Layer 2 – Memory Plus Foam. This layer gives your body some pressure relief at the top.
  • Layer 3 – Helix Responsive Foam. A medium-feel foam reacts to your movements for adaptive contouring.
  • Layer 4 – Helix Responsive Foam. Another layer of responsive foam adds more cushioning and underlying support before the coil layer below.
  • Layer 5 – Coil Unit. Pocketed coils keep you aloft while responding individually to your movements.
  • Layer 6 – DuraDense Foam. A dense layer of foam makes up the foundation of the mattress.

Our Take: “Most couples will love the Helix Midnight. The high-performing edge support combined with limited motion transfer makes this a great option for people who share their bed, whether that’s with a partner or the family dog.”Emma Mattei, Sleep Advisor Mattress Tester

What We Liked

  • Lots of bounce – The combination of strong coils and responsive foams on top make this bed super springy. You should be able to move around and reposition without feeling “stuck” in its layers.
  • Great motion isolation – Given its bounce, we were impressed with the Helix Midnight’s ability to prevent motion transfer across its surface. 

Potential Drawbacks

  • Not super cradling on top – There are foams on top of the Helix Midnight, but not enough to mimic the sink that an all-foam mattress will give you. It’s something to consider if you prefer being “hugged” by your bed.
  • Not for stomach sleepers – This bed should support side and back sleepers fine, but we don’t think it’ll keep stomach sleepers lifted enough to prevent misalignment.

Customer Reviews of the Helix Midnight

The Helix Midnight rates 4.5 stars out of 5 on Helix’s website. The main negative is that reviewers tend to find it too soft for their liking and feel as though they’re sinking. But overall, users say they’re getting a great night’s sleep and some pain relief.

Want to know more? Check out our full Helix Midnight review or our list of the best mattresses for side sleepers.

DreamCloud – Best Luxury Split King Mattress

Best Luxury Split King Mattress

DreamCloud Original Mattress

DreamCloud Original Mattress

Luxurious hybrid at a great price with a lifetime warranty.

Score 4.0/5
Read DreamCloud Original Mattress Review
CHECK PRICE

Material

Hybrid

Trial Period

365 nights

Shipping Method

Free shipping

Firmness

Medium-firm: 6.5/10

Warranty

Lifetime warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Sleeping
Ideal for average weight back sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.6/5
Watch Our Video Review
Best Luxury Split King Mattress

DreamCloud Original Mattress

DreamCloud Original Mattress

Luxurious hybrid at a great price with a lifetime warranty.

Score 4.0/5
Read DreamCloud Original Mattress Review

Material

Hybrid

Warranty

Lifetime warranty

Firmness

Medium-firm: 6.5/10

Shipping Method

Free shipping

Trial Period

365 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Sleeping
Ideal for average weight back sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.6/5
Watch Our Video Review
DreamCloud Original Mattress
Best Luxury Split King Mattress

DreamCloud Original Mattress

Luxurious hybrid at a great price with a lifetime warranty.

Score 4.0/5
Read DreamCloud Original Mattress Review

Material

Hybrid

Firmness

Medium-firm: 6.5/10

Trial Period

365 nights

Warranty

Lifetime warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Back Sleeping
Ideal for average weight back sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.6/5
Watch Our Video Review

Why the DreamCloud Earned Best Luxury Split King Mattress

It’s hard to believe that a high-end mattress like the DreamCloud could come at such a dreamy price. This bed is a hybrid with a super-lifted feel, topped with cashmere for a luxurious finish. It should work for nearly all sleeping positions and body types, so I call it a “jack of all trades” type of bed.

Folks wanting a split king should appreciate that DreamCloud offers such a model, along with an adjustable bed frame to totally customize the experience.

Take a closer look at the mattress construction of the original DreamCloud mattress

What’s the DreamCloud Made Of?

The DreamCloud uses CertiPUR-US® certified foams in its 14-inch, seven-layer construction.

Inside the DreamCloud

  • Layer 1 – Top Cover. A cashmere blend cover makes this bed look and feel luxurious.
  • Layer 2 – Soft Foam (1.5 inches). A plush foam layer tops off the mattress for premium cushioning.
  • Layer 3 – Gel-Infused Memory Foam (1 inch). This layer adjusts to your body for a hugging and pressure-relieving contour.
  • Layer 4 – Transition Layer (2 inches). A layer of dynamic foam encourages proper alignment.
  • Layer 5 – Coil Unit (8.5 inches). Individually wrapped coils keep up the support while enhancing motion isolation. Thicker coils line the edges for reinforcement.
  • Layer 6 – Base Layer (1 inch). This foundation provides structure for the rest of the bed.
  • Layer 7 – Lower Cover. The cover on the bottom keeps the mattress and everything within it in place. There are also handles along the sides for easy maneuvering.

My Take: The DreamCloud is consistently one of my top mattresses to recommend and one of my personal favorites. It’s also pretty affordable; sales and coupons are frequent on DreamCloud’s site, so you can knock off dollars without worrying about sacrificing any quality.

What I Liked

  • Affordable luxury – Luxury mattresses will usually cost you closer to $3,000 for a specialized bed like a Split King, but the DreamCloud model retails for around $2,000. It also comes with a generous year-long trial and lifetime warranty.
  • Lifted feeling – I tried out every position on this mattress and felt supported properly in each one. The DreamCloud definitely keeps you aloft, so you’ll feel like you’re on top of this mattress rather than sinking into it.

Potential Drawbacks

  • Not super contouring – This lifted feeling doesn’t lend itself well to the contouring cushion typical of most foams. You won’t feel swaddled by the foam layers on top, but they’ll still provide some comfort and pressure relief.
  • Lacking edge support – The DreamCloud has reinforced edges that hold up when you lay near them, but when it comes to sitting, it’s a no-go. They sank pretty far under my weight.

Customer Reviews for the DreamCloud

The DreamCloud Original scores a solid 4.7 out of 5 stars among customers on its site. While some customers appreciate the value and affordability of the DreamCloud Original mattress, others find it to be on the heavier side, which could make moving or rotating the mattress more challenging.

Curious for more? Check out our DreamCloud review or our picks for the best luxury mattress.

Nolah Evolution – Best Soft Split King Mattress

Best Soft Split King Mattress

Nolah Evolution Hybrid Mattress

Nolah Evolution Hybrid Mattress

Nolah’s innovative pressure-relieving abilities should be an excellent fit for side-sleepers, and if you struggle with overheating, the AirFoamICE™ technology should keep you cool all night long.

Score 4.7/5
Read Nolah Evolution Hybrid Mattress Review
CHECK PRICE

Material

Hybrid

Trial Period

120 nights

Shipping Method

Free shipping

Firmness

Multiple firmness options

Warranty

Lifetime warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
Best Soft Split King Mattress

Nolah Evolution Hybrid Mattress

Nolah Evolution Hybrid Mattress

Nolah’s innovative pressure-relieving abilities should be an excellent fit for side-sleepers, and if you struggle with overheating, the AirFoamICE™ technology should keep you cool all night long.

Score 4.7/5
Read Nolah Evolution Hybrid Mattress Review

Material

Hybrid

Warranty

Lifetime warranty

Firmness

Multiple firmness options

Shipping Method

Free shipping

Trial Period

120 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
Nolah Evolution Hybrid Mattress
Best Soft Split King Mattress

Nolah Evolution Hybrid Mattress

Nolah’s innovative pressure-relieving abilities should be an excellent fit for side-sleepers, and if you struggle with overheating, the AirFoamICE™ technology should keep you cool all night long.

Score 4.7/5
Read Nolah Evolution Hybrid Mattress Review

Material

Hybrid

Firmness

Multiple firmness options

Trial Period

120 nights

Warranty

Lifetime warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight and average weight back sleepers.
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review

Why the Nolah Evolution Earned Best Soft Split King Mattress

The Nolah Evolution is a hybrid mattress, so it’s impressive that it feels so soft. Its coils sit beneath five foam layers that give the bed its cushiony, plush top. The gentle cradle should benefit anyone who needs pressure relief but doesn’t want to feel too “stuck” in their mattress.

The Split King model should work well for couples who want a soft mattress with some adjustability and an extra bit of motion isolation. You can also purchase two Twin XL mattresses if you want different firmnesses.

Nolah Evolution average weight stomach sleeper test
Testing the Nolah Evolution in our studio.

What’s the Nolah Evolution Made Of?

The Nolah Evolution has eight layers in its 15-inch-thick construction. It’s available in Plush, Luxury Firm, or Firm.

Inside the Nolah Evolution

  • Layer 1 – Cover. A mix of organic cotton and ArcticTex™ material creates a soft and cool sleep surface.
  • Layer 2 – Euro Topper (2 inches). Breathable foam and quilting with high thermal conductivity cushions your body and adds to the bed’s cooling capability.
  • Layer 3 – AirFoamICE™ (2 inches). This layer has graphite infused into its foam to speed up cooling while it relieves pressure. Around it and the layer above is an AirBreath™ gusset that allows any excess heat to escape.
  • Layer 4 – High-Resilience Foam (2 inches). This firmer foam adds support to the above comfort layers.
  • Layer 5 – Transition Foam (1 inch). A latex alternative, this robust and bouncy foam leads into the innerspring layer.
  • Layer 6 – Coil Unit (8 inches). Three zones of HDMax™ coils target different areas of the body to maintain alignment and ease pressure buildup.
  • Layer 7 – Foundation. The durable base of the bed is made up of recycled plant fibers.
  • Layer 8 – Bottom Cover. This handled cover helps with transport while the bottom resists slipping on your bed frame or base.

Our Take: “The Evolution is packed with soft layers for plush relief… When I crawled into this bed, I could really feel it gently cradle my body.” Stuart Petty, Sleep Advisor Mattress Tester

What We Liked

  • Has some bounce – The layers of foam on top make this bed uber-soft, but they don’t dampen too much of the bounce from the coils underneath. You can have the comfortable cradle of foam without sacrificing ease of movement.
  • Cooling capability – The Nolah Evolution was designed with hot sleepers in mind. The hybrid construction means there will be airflow through the coils, and most of the foam layers are infused with gels or specifically engineered to run cooler than traditional foam. There’s even a “gusset” on top to let air escape. 

Potential Drawbacks

  • Too soft for some – There’s a reason this bed earned the “soft” spot on this list. It might be too plush for sleepers who need more support, like stomach sleepers or folks over 200 pounds.
  • High price point – The Nolah Evolution is one of Nolah’s higher-end mattresses, so it may not be the best budget pick—especially for a Split King, which costs a little over $3,000 before sales and coupons.

Customer Reviews of the Nolah Evolution

The Nolah Evolution rates 4.5 stars out of 5 on Nolah’s website. Customers frequently commend the Nolah Evolution mattress for its exceptional pressure relief and cooling properties, but some have observed that it may produce slight off-gassing upon unboxing.

Check out more: Read our full Nolah Evolution review, or peruse more of our recommendations for the best soft mattresses.

Bear Elite Hybrid – Best Split King Mattress for Back Pain

Best Split King Mattress for Back Pain

Bear Elite Hybrid Mattress

Bear Elite Hybrid Mattress

With coils and foam layers, this Bear mattress offers zoned support without taking away from the pressure-relieving properties. The bed also has copper infusions to ensure the best cooling for hot sleepers and athletes.

Score 4.3/5
Read Bear Elite Hybrid Mattress Review
CHECK PRICE

Material

Hybrid

Trial Period

120 nights

Shipping Method

Free shipping

Firmness

Medium-firm: 6/10

Warranty

Lifetime Warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5
Best Split King Mattress for Back Pain

Bear Elite Hybrid Mattress

Bear Elite Hybrid Mattress

With coils and foam layers, this Bear mattress offers zoned support without taking away from the pressure-relieving properties. The bed also has copper infusions to ensure the best cooling for hot sleepers and athletes.

Score 4.3/5
Read Bear Elite Hybrid Mattress Review

Material

Hybrid

Warranty

Lifetime Warranty

Firmness

Medium-firm: 6/10

Shipping Method

Free shipping

Trial Period

120 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5
Bear Elite Hybrid Mattress
Best Split King Mattress for Back Pain

Bear Elite Hybrid Mattress

With coils and foam layers, this Bear mattress offers zoned support without taking away from the pressure-relieving properties. The bed also has copper infusions to ensure the best cooling for hot sleepers and athletes.

Score 4.3/5
Read Bear Elite Hybrid Mattress Review

Material

Hybrid

Firmness

Medium-firm: 6/10

Trial Period

120 nights

Warranty

Lifetime Warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Sleeping
Ideal for lightweight, average weight, and heavyweight back sleepers.
Stomach Sleeping
Ideal for lightweight and average weight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.5/5

Why the Bear Elite Hybrid Earned Best Split King Mattress for Back Pain

When it comes to back pain, sleepers are going to need a bed that gives them proper support but doesn’t feel so firm that it exacerbates pressure buildup. The Bear Elite Hybrid has cushioning foams on top for some cradling and a zoned coil unit to keep the lower back lifted. 

Couples wanting a Split King should also appreciate that the bed’s sturdy edges strengthen the perimeter, so there should be little to no sinking near the sides or center.

Bear Elite Hybrid lightweight back sleeper test
Testing the Bear Elite Hybrid in our studio.

What’s the Bear Elite Hybrid Made Of?

The Bear Elite Hybrid is 14 inches thick with five layers. It’s available in Firm, Medium, or Soft models.

Inside the Bear Elite Hybrid

  • Layer 1 – Cover. This cover is made up of Phase Change Material for cooling and Celliant® fibers for muscle recovery. The latter reportedly converts excess body heat into infrared energy to promote tissue oxygenation.
  • Layer 2 – Memory Foam. Copper in the first foam layer keeps heat at bay while acting as a natural antimicrobial barrier.
  • Layer 3 – Dynamic Transition Foam. This layer of foam contours to your body while easing you into a comfortable sink.
  • Layer 4 – Coil Layer. The individually wrapped springs are zoned to balance support and give across different areas of the body. Reinforced coils also line the edges.
  • Layer 5 – Support Foam. A dense foam base keeps the mattress stable.

Our Take: “Sleepers with back, hip, or shoulder pain will love the zoned coil system. It is built to relieve pressure in the areas you sleep on and support the areas that need a little extra boost, specifically the lumbar area.” – Stuart, Sleep Advisor Mattress Tester

What We Liked

  • Cooling champ – The Bear Elite Hybrid has plenty of features that regulate temperature and make it a great fit for hot sleepers. The cooling cover, copper-infused foam, and pocketed coils all work to keep the bed from overheating.
  • Strong edges – Stuart found out during testing that “the edges are extra-reinforced by the zoned coil system, so you can really take advantage of the entire surface of the bed.”

Potential Drawbacks

  • Wait for a sale – The Bear Elite Hybrid is considered a luxury mattress and therefore has a high price. Before any markdowns, it will cost you nearly $4,000 for a Split King.
  • Not for stomach sleepers – Though the Bear Elite Hybrid has some springs and supportive foams, we don’t think it’d be a good fit for stomach sleepers—they’re liable to sink too low. 

Customer Reviews for the Bear Elite Hybrid

According to Bear’s website, the Bear Elite scores about 4.5 out of 5 stars. Some customers find the Bear Elite Hybrid mattress too firm for their liking, but it receives praise in its reviews for its advanced cooling technology and pressure relief.

Need to know more? Read our Bear Elite Hybrid review, or check out the best mattresses for back pain.

Brooklyn Bedding Aurora Luxe – Best Cooling Split King Mattress

Best Cooling Split King Mattress

Brooklyn Bedding Aurora Luxe Mattress

Aurora Luxe Mattress

The Aurora Luxe is a cooling mattress with TitanCool™ Technology, copper and gel infusions, and a temperature-regulating coil layer working together to provide exceptional comfort for those who sleep hot.

Score 4.0/5
Read Brooklyn Bedding Aurora Luxe Mattress Review
CHECK PRICE

Material

Hybrid

Trial Period

120 nights

Shipping Method

Free shipping

Firmness

Multiple firmness options

Warranty

10-year warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Back Pain
This bed is perfect for anyone suffering from back pain.
Side Sleeping
Ideal for average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Best Cooling Split King Mattress

Brooklyn Bedding Aurora Luxe Mattress

Aurora Luxe Mattress

The Aurora Luxe is a cooling mattress with TitanCool™ Technology, copper and gel infusions, and a temperature-regulating coil layer working together to provide exceptional comfort for those who sleep hot.

Score 4.0/5
Read Brooklyn Bedding Aurora Luxe Mattress Review

Material

Hybrid

Warranty

10-year warranty

Firmness

Multiple firmness options

Shipping Method

Free shipping

Trial Period

120 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Back Pain
This bed is perfect for anyone suffering from back pain.
Side Sleeping
Ideal for average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Aurora Luxe Mattress
Best Cooling Split King Mattress

Brooklyn Bedding Aurora Luxe Mattress

The Aurora Luxe is a cooling mattress with TitanCool™ Technology, copper and gel infusions, and a temperature-regulating coil layer working together to provide exceptional comfort for those who sleep hot.

Score 4.0/5
Read Brooklyn Bedding Aurora Luxe Mattress Review

Material

Hybrid

Firmness

Multiple firmness options

Trial Period

120 nights

Warranty

10-year warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Hot Sleepers
If you often overheat while you sleep, this mattress should help you stay cool.
Back Pain
This bed is perfect for anyone suffering from back pain.
Side Sleeping
Ideal for average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review

Why the Brooklyn Bedding Aurora Luxe Earned Best Cooling Split King Mattress

Even on a split king, you might feel your partner’s heat from the other side of the bed—or perhaps you’re just prone to overheating. No need to fear, the Brooklyn Bedding Aurora Luxe is here. This luxurious hybrid works to keep the temperature down with a plethora of cooling features. 

It starts out with a GlacioTex™ cover that should feel cool to the touch, which works alongside layers of breathable foams and a pocketed coil unit. 

Though Brooklyn Bedding doesn’t offer the Aurora Luxe in a Split King option, you can easily make one by buying two Twin XL mattresses and pushing them together.

What’s the Brooklyn Bedding Aurora Luxe Made Of?

The Brooklyn Bedding Aurora Luxe is about 13 inches tall. It features a total of six layers including its cover.

Inside the Aurora Luxe
  • Layer 1 – GlacioTex™ Cooling Cover. The cooling gel in this cover reacts to excess heat or cold to keep your skin at a comfortable temperature for sleep. You can also pay to upgrade to a pillow top cover.
  • Layer 2 – CopperFlex™ Foam. This super-elastic foam is meant to mimic latex, providing all of the contouring, pressure relief, and bounce, but with a higher durability. 
  • Layer 3 – Supreme Response Comfort Foam. A second layer of foam boosts the responsiveness of the layer above it, ensuring it bounces back after you switch positions.
  • Layer 4 – Gel Swirl Memory Foam. Another cooling layer, this gel foam relieves pressure buildup and adds even more responsiveness to the bed.
  • Layer 5 – Zoned Coils. These coils are zoned to ensure lift and give in all the proper places. Those around the edges are also reinforced for a stronger perimeter.
  • Layer 6 – High-Density Foam Base. A durable foam foundation layer.

My Take: I was super-impressed with the Aurora Luxe’s ability to keep cool. During one of our temperature gun tests, I recorded the surface temperature of the mattress actually going down, which is rare to see. 

What We Liked

  • Plenty of bounce – Not only are the springs on the Brooklyn Bedding Aurora Luxe responsive, the foams are too! I rated the bounce on this bed as “perfect” for my needs.
  • Multiple firmness options – Couples choosing a split king should be happy to know that the Aurora Luxe comes in three firmness options: Soft, Medium, and Firm. So, there’s no need to compromise; just order two twin XLs in each desired firmness.

Potential Drawbacks

  • So-so edge support – Despite the Aurora Luxe boasting reinforced edges, I wasn’t all that impressed with how they held up under weight. Laying near them is alright, but you’ll definitely sink if you sit at the edge.
  • Firm for some – We tested the Medium variant of the Aurora Luxe, and even that, we thought, was a little too firm for some folks. If you’re a side sleeper, stick to the Soft model or find a different softer bed for pressure relief.

Customer Reviews for the Brooklyn Bedding Aurora Luxe

On Brooklyn Bedding’s site, the Aurora Luxe has a rating of 4.7 out of 5 stars and more than 4,000 reviews. Customers praise the Brooklyn Bedding Aurora Luxe mattress for its advanced cooling features, but some have mentioned that it is relatively expensive compared to other options.

Want to know more? Check out our full Brooklyn Bedding Aurora Luxe review or the best cooling mattresses.

Titan Plus – Best Split King Mattress for Heavier Sleepers

Best Split King Mattress for Heavier Sleepers

Titan Plus

Titan Plus mattress testing image

This specially-designed hybrid is made for heavier sleepers to help them get better, more comfortable sleep.

Score 4.5/5
Read Titan Plus Review
CHECK PRICE

Material

Hybrid

Trial Period

120 nights

Shipping Method

Free shipping

Firmness

Firm: 7.5/10

Warranty

10-year warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for heavyweight back sleepers.
Stomach Sleeping
Ideal for heavyweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Best Split King Mattress for Heavier Sleepers

Titan Plus

Titan Plus mattress testing image

This specially-designed hybrid is made for heavier sleepers to help them get better, more comfortable sleep.

Score 4.5/5
Read Titan Plus Review

Material

Hybrid

Warranty

10-year warranty

Firmness

Firm: 7.5/10

Shipping Method

Free shipping

Trial Period

120 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for heavyweight back sleepers.
Stomach Sleeping
Ideal for heavyweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Titan Plus mattress testing image
Best Split King Mattress for Heavier Sleepers

Titan Plus

This specially-designed hybrid is made for heavier sleepers to help them get better, more comfortable sleep.

Score 4.5/5
Read Titan Plus Review

Material

Hybrid

Firmness

Firm: 7.5/10

Trial Period

120 nights

Warranty

10-year warranty

Shipping Method

Free shipping

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Seniors
This bed is perfect for senior sleepers.
Hip Pain
This bed is perfect for anyone suffering from hip pain.
Back Pain
This bed is perfect for anyone suffering from back pain.
Back Sleeping
Ideal for heavyweight back sleepers.
Stomach Sleeping
Ideal for heavyweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review

Why the Titan Plus Earned Best Split King Mattress for Heavier Sleepers

Folks over 200 pounds often contend with sagging mattresses that don’t give them the proper support. The Titan Plus was designed specifically for these sleepers, so there’s no need to worry about sinking too deep.

The coil unit should evenly distribute weight while maintaining lift, and the foam layers on top should provide just the right amount of cushioning comfort. The Titan Plus is designed to hold up to 1,000 pounds, and a split king should maximize this ability by acting like two separate mattresses.

Though Titan doesn’t offer the Plus in a Split King option, you can easily make one by buying two Twin XL mattresses and pushing them together.

Brooklyn Bedding Titan Plus Construction from the lab

What’s the Titan Plus Made Of?

The Titan Plus has four layers and is 11 inches tall.

Inside the Titan Plus

  • Layer 1 – Quilted Gel Memory Foam (1 inch). The surface of this mattress is cushioning and cooling, and it is designed to retain its shape while bearing weight.
  • Layer 2 – TitanFlex™ Foam (2 inches). TitanFlex™ foam adds pressure relief as it contours to your body.
  • Layer 3 – Coil Layer (6 inches). Individually wrapped TitanCore springs give the bed its support. They’re reinforced along the edges to prevent unwanted sagging.
  • Layer 4 – Foam Base (2 inches). A high-density base of foam provides the sturdy foundation for the coils and comfort layers above.

Our Take: “I definitely sink in a little bit, but this mattress feels supportive enough that I don’t feel stuck at all. Unlike many mattresses that I have tried, my weight is evenly distributed over this surface and I feel extremely comfortable.” – Patrick, Sleep Advisor Mattress Tester

What We Liked

  • Isolates motion well – We noticed during testing that this bed could absorb movement despite its sturdy construction. Patrick said, “For as much bounce as this bed has, it contains motion pretty well. Restless sleepers probably won’t wake up their sleeping partners.”
  • Versatile – This bed was designed for plus-size folks, and they’ll be happy to know that it can support you in any sleeping position. Side sleepers should find some pressure relief, back sleepers should remain aligned, and stomach sleepers won’t sink in too far.

Potential Drawbacks

  • Not for lightweight sleepers – Though heavier folks should rest easy, if your partner is on the petite side, they might find the bed too firm and unyielding.
  • Cooling costs extra – The Titan Plus’s individually wrapped coils allow for some air to flow through the mattress, but if you want that coolness to reach the surface, you may want to pay extra for the GlacioTex™ cover. 

Customer Reviews for the Titan Plus

Users on Titan by Brooklyn Bedding’s site have given the Titan Plus a 4.7 out of 5 stars. Customers find the Titan Plus mattress to offer exceptional durability and support, but some mention that it might be too firm for those who prefer a softer feel.

Still thinking? Take a look at our Titan Plus review or our picks for the best mattresses for heavy people and best mattresses that won’t sag.

What Is a Split King Mattress?

A Split King mattress is the same size as a King mattress, measuring 76 by 80 inches. However, the difference is in the structure itself because a Split King is actually split in half, hence the name. This makes it look like two Twin XL mattresses next to one another. 

Each of these two beds measures 38 by 80 inches. The Split-King design allows partners to better customize their side of the bed based on their specific needs. 

What to Look for in a Split King Mattress 

A Split King mattress is an exceptionally versatile option for partners with different sleeping habits. Many types are available, and there are certain factors to consider to ensure you’re getting the best bed for you and your partner. 

Type of Mattress 

From our mattress studio, images of our tested mattresses in different materials

Innerspring Mattresses

An innerspring mattress has coils acting as the main support layer. These beds usually have only one comfort layer and fabric that covers the coils. This is the oldest and most traditional type of mattress. They’re usually beneficial for those who don’t need a lot of cushioning and prefer bouncy beds. 

Hybrid Mattresses 

Hybrid beds also have coils but are different than innerspring mattresses because they have more comfort layers. This type is essentially a combination of innerspring and all-foam beds, so it’s often on the pricey side. A hybrid mattress provides excellent support thanks to the coils, but it also has comfort foams for added cushioning and pressure relief. 

Memory Foam Mattresses 

Memory foam mattresses are popular due to their pressure-relieving properties. These combine several foam layers, usually with memory foam on top for pressure relief and denser poly foam below for support.  Although they don’t have much bounce, they’re excellent at isolating motion, which means motion won’t travel across the mattress when someone moves around. That said, couples don’t need to worry about this with Split King beds as the mattresses are separated.

Testing the layers and construction of the nectar mattress
The memory foam layers of the Nectar.

Latex Mattresses 

Latex mattresses provide pressure relief similar to memory foam models, but they’re bouncier. Often, latex beds are made with natural or organic latex, as well as other eco-friendly materials. They are also naturally cool, so they don’t retain heat like memory foam does. Latex beds are usually more costly, but they are highly durable as well.

Other Considerations When Shopping for a Split King Mattress 

Adjustable Base Compatibility

If you have an adjustable base, a Split King mattress could be a perfect addition to enhance the overall experience. 

However, it’s important that your adjustable base is also a Split King so that each partner can lift or lower their individual side as desired. Another thing to consider is whether your Split King mattress is compatible with an adjustable base since not all mattresses work with adjustable bases. 

Sleeping Position 

Our testers test each sleeping position to make sure each mattress fits the right sleeper

If you usually sleep on your stomach, you probably need a firmer bed than your partner, especially if they’re a side sleeper. This is where a Split King mattress can help as it allows you to have two mattresses in one. You can choose one side that fits your sleeping position and the other that’s more comfortable for your partner’s sleeping position. 

Weight/Body Type of Sleepers 

How much you and your partner weigh is also an important factor that affects a mattress’ overall support and comfort. For example, lighter-weight people often prefer softer beds that allow them to sink in more to receive enough pressure. Conversely, heavier sleepers often need firmer mattresses that can do a better job of keeping them lifted for good spine alignment. 

A Split King mattress allows you to have different firmness and support levels on each side to accommodate different body types. 

Firmness 

Firmness reflects how soft or hard a mattress feels, and a Split King can make it possible to have two in one. In other words, you can have one side softer than the other if needed. 

Think about your weight and preferred sleeping position when choosing a firmness, and make sure the other side is a good fit for your partner’s weight and sleeping position. 

That said, you should confirm that a particular mattress provides different firmness options for each side because not all brands allow this. 

Titan Plus pressure testing
The Titan Plus has a distinct firm feel (7.5 out of 10 for firmness), making it great for heavier people looking for a split-king bed.

Cooling 

Cooling features are crucial for hot sleepers who struggle to find a cool spot on the mattress. Cooling mattresses can include specialized features such as cooling covers, gels, copper, and breathable materials like cotton and coils. 

It’s also important to mention that some mattress types are naturally more cooling than others. For example, latex and hybrid beds are more cooling than all-foam mattresses. However, many memory foam beds now come with gel infused into their foam to help with cooling.

Motion Isolation 

Motion isolation is a mattress’ capability to keep motion isolated and prevent it from moving to other parts of the mattress. Usually, memory foam beds are the best for this. The upside to a Split King bed, however, is that it’s separated in the middle, which means you shouldn’t feel a partner’s movement anyway. 

See More: Best Beds for Couples

Sex 

Sexually active couples usually look for a bouncy bed, but with a Split King, things can get a bit complicated. In other words, the middle of the bed can be a little uncomfortable for some people. This is where the two mattresses come together, and the middle can have stitching that’s sometimes bulky. Whether or not this is comfortable and suitable for sex depends on the particular model you buy. 

Learn More: Best Mattress for Sex

Pressure Relief 

Pressure relief is a major factor for many people, especially those who sleep on their side. Side sleepers need maximum pressure relief around the shoulders and hips, which is why they often go for softer mattresses with comfort layers made from memory foam or latex. 

More: Best Mattress for Pressure Relief

Bear Elite Hybrid average weight back sleeper test
The Bear Elite Hybrid earned a 5 out of 5 for support, making it an excellent bed for pressure relief and back pain.

Edge Support

Edge support is always important for people who like to spread out and often sleep near the edge of the bed. Most companies reinforce this area in different ways, but how good the edge support is will depend on the particular bed and its materials. Hybrids often have stronger edges, but even memory foam and latex beds can do a good job if there’s reinforced foam around the perimeter. 

Budget 

Regardless of the specific model you choose, a Split King size will always be more costly because it’s one of the larger bed sizes. However, the price is often the same as a King-size of the same brand. 

To help you save money, consider shopping during major mattress sales. Additionally, shopping online means you’re buying directly from the manufacturer, which helps cut overhead costs.

Nectar Mattress Sleep Advisor
The Nectar is a high-quality affordable bed that comes in a split-king size.

Bed Frames for Split King Mattresses

A Split King mattress is the same size as a King mattress, which means you can use a King-size frame with both models. However, you’ll have a small gap between the two Twin XL beds that make up a Split King. 

In the case of adjustable bed frames, it’s helpful to get a Split King adjustable base rather than a King size. This way, if one partner wants to sleep on an incline and the other doesn’t, there’s no issue.

Explore our picks for the best bed frames here.

Tips for Keeping Split King Mattresses from Separating

After a while, you may notice your Split King mattress separating. This is easy to spot by checking the gap in the middle. To help with this, you can tie the two beds together with any of the following items:

  • Zip ties
  • Velcro straps
  • Bungee cords
  • Connecting straps

Split King vs. Other Mattress Sizes

Split King vs. King Mattresses

A Split King mattress is the same size as a King mattress; the only difference is that a Split King is separated in the middle. This means you’re actually getting two beds in one. 

Although the size remains the same, a Split King is a bit more versatile and suitable for partners with very different sleeping habits. For example, if your partner often turns during the night, you’re unlikely to feel this on a Split King mattress because there’s a gap between your side and their side.

Browse the Best King Mattress picks, tested by our experts.

Split King vs. California King Mattresses

A California King mattress is larger than a Split-King or regular King bed. 

Some brands also offer a Split California King option, which is the same as a standard California King, but again, there’s a gap in the middle. 

Explore our picks for the Best California King Beds.

Best Split King Mattress FAQs

How much does a Split King mattress cost?

A Split King mattress is one of the more expensive sizes because it’s also among the largest options. However, in most cases, the price of a Split King model is the same as the King-size one.

How big are Split King mattresses?

A Split King mattress measures 76 by 80 inches, which means it has two Twin XL mattresses measuring 38 by 80 inches individually. In some cases, you may notice an inch or two difference, but that depends on the brand.

Can I use King-size sheets on a Split King bed?

You can use King-size sheets on a Split King mattress if you already have King-size sheets. This will also help to cover the gap between the two beds to make it more aesthetically pleasing. That said, if you and your partner often struggle with pulling the covers, you also have the often to buy two Twin XL sets.

Compare Prices of the Best Split King Mattresses

MattressBest ForPrice (Split King)Review
Saatva ClassicEditor’s Pick$2,990Saatva Mattress Review
NectarAffordable$1,798Nectar Mattress Review
Helix MidnightSide Sleepers$2,122.60 (two Twin XLs)Helix Midnight Review
DreamCloudLuxury$2,178DreamCloud Review
Nolah EvolutionSoft$3,198Nolah Evolution Review
Bear Elite HybridBack Pain$3,920Bear Elite Hybrid Review
Brooklyn Bedding Aurora LuxeCooling$2.464 (two Twin XLs)Brooklyn Bedding Aurora Luxe Review
Titan PlusHeavier Sleepers$1,598 (two Twin XLs)Titan Plus Review
Julia Forbes

Julia Forbes

Lead Product Tester

About Author

Julia is the Lead Reviewer at Sleep Advisor, specializing in testing out mattresses and sleep accessories – she’s in the right line of work, because she loves to sleep.

Stomach Sleeper