The Cocoon by Sealy Mattress (Chill Model) Review – Updated for 2023

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The Cocoon Chill comes from Sealy, one of the most recognizable names in the mattress business since 1881.

Engineers sat at the drawing board for two years and tested prototypes until they found a bed-in-a-box option they felt was worthy of their brand. The Cocoon Chill Mattress has a seemingly simple all-foam construction, but its proprietary cooling technology sets it apart from the average foam mattress.

However, does the Cocoon Chill live up to its name? Our in-depth look at the Cocoon Chill by Sealy scores the bed on a system based on characteristics like cooling, sinkage, support, and pressure relief. This should help you decide if the Cocoon Chill is the right mattress for you.

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The Cocoon Chill has a 10-inch profile and should fit a range of sleepers thanks to its medium-firm feel.
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Who We Recommend The Cocoon Chill For:

  • Hot sleepers – The cover is engineered with proprietary phase change technology that adjusts the temperature of the bed’s surface based on your body heat, pulling heat away when your body feels hot and drawing it back to you when your body cools down. This technology helps ensure temperature changes don’t wake you up.

  • Fans of memory foam – If you enjoy the excellent contouring and pressure relief that comes from memory foam, you will likely appreciate the Cocoon Chill. This bed should also limit motion transfer and provide stable support thanks to the Responsive Comfort Foam and Essential Support Layer.

  • Those who like a balanced feel to their mattress – For sleepers who don’t like a mattress that’s too soft or firm, you may enjoy the Cocoon Chill’s balanced feel. Its medium-firmness level makes it a good choice for many sleepers.

Who We Don’t Recommend The Cocoon Chill For:

  • Not much bounce – Though some bounce comes from the thick poly foam base, which helps support your weight and navigate the bed’s surface, it shouldn’t have the same feel as a traditional innerspring mattress. Furthermore, sexually-active couples or individuals with mobility issues may prefer the extra responsiveness that comes with a high-bounce bed.

  • Might not be supportive enough – This bed features a medium-firm construction. Although it is a universal feel that should work well for most shoppers, heavyweight sleepers may prefer a firmer bed to keep their spine well-aligned.

First Impressions: Firmness & Feel

Firmness Scale: 6/10

Please remember that firmness is a subjective characteristic and your shape will dictate how you experience a bed. A heavier person whose weight can more easily push through softer comfort and support layers may experience a bed as softer than a lightweight person. The way you are shaped could also play a role here. Consider your weight, shape, and size when evaluating firmness scores.

Mattress Firmness Level 6

We rated this bed a 6.5 out of 10 on our firmness scale, which means it has a medium-firm feel. This firmness should work for most people, but especially those who weigh between 130 and 230 pounds.

This mattress firmness is also good for couples, as it’s able to accommodate a range of sleeping positions. However, it may be too soft for heavy people sleeping on their stomachs and too firm for side sleepers under 130 pounds.

How Does It Feel?

The Cocoon Chill has a soft cover, and the stitching feels durable when stretched. The mattress feels cool at first, but you should notice how the temperature regulation maintains a comfortable balance after a few hours.

Lying down, you should slowly settle into this bed for a gently cradled feeling. The base layer gives this bed a small bit of bounce and is supportive enough to help you shift around on top of the bed.

What We Like About the Cocoon Chill

  • The cooling effect – The Cocoon Chill is designed specifically for hot sleepers, as it prevents heat build-up. The bed has proprietary Phase-Change Technology that adjusts the surface temperature, which prevents the bed from overheating. In addition, it draws your body heat away from you.

  • Mid-range firmness – This bed is rated 6.5 on our firmness scale, which places it a little over the middle of the scale. As a result, this bed should work nicely for average-weight people, as well as those who rest on their side or back.

  • Excellent motion isolation – Thanks to its foam construction, the Cocoon Chill has excellent motion isolation that makes it a good option for couples and anyone else who shares a bed.

Our Cocoon Chill Complaints

  • No bounce – The Cocoon Chill’s memory foam has little bounce, which means it may not be the best option for people with mobility issues. Although it has good motion isolation, those who prefer a bouncier bed may want to look into other options.

  • Too firm for side-sleeping – Side sleepers, especially those who weigh under 130 pounds, may find this bed too firm to cradle the shoulders, hips, and knees. As a result, the Cocoon Chill may cause some pressure build-up in these areas.

  • Not for heavy people – Since the Cocoon has mid-range firmness, it may feel too soft for stomach sleepers who weigh over 230 pounds.

Testing the Cocoon Chill Mattress: How it Performed

We tested the Cocoon Chill to better evaluate how it performs in different sleeping positions. This allowed us to rate the mattress according to body weight and preferred sleeping position. In addition, we also tested factors like cooling, motion isolation, edge support, and pressure relief to help you decide if this mattress is right for you.

Sleeping Positions for Different Body Types

The Cocoon Chill mattress can hold a total of 500 pounds – or 250 pounds per person for those who share a bed with a partner. This weight limit should work well for most individual sleepers and couples, and the ten inches of dense memory foam should offer sleepers plenty of support. The 500-pound weight limit also applies to the hybrid version of this bed. Sleepers who weigh over 250 pounds may find they sink further into the bed, leaving them feeling stuck and uncomfortable.

WeightSide Sleepers
Side Sleeping Icon
Back Sleepers
Back Sleeping Icon
Stomach Sleepers
Stomach Sleeping Icon
Lightweight Sleepers (-130 lbs)★☆☆★★☆★★★
Average-Weight Sleepers (130-230 lbs)★★★★★★★★☆
Heavyweight Sleepers (+230 lbs)★★☆★☆☆☆☆☆

Side Sleepers

  • Lightweight Sleepers – Lightweight side sleepers don’t weigh enough to activate the bed’s upper layers. This will likely result in pressure build-up since there’s almost no cradling.
  • Average Weight Sleepers – Those who weigh 130 to 230 pounds should like how the Cocoon feels, especially if they weigh closer to 200 pounds. The Cocoon Chill contains a layer of Perfect Fit Foam, which conforms to your body and relieves tension in sensitive areas.
  • Heavyweight Sleepers – Heavy side sleepers should find this bed softer, which should allow for optimal pressure relief for those who struggle with shoulder and hip pain.

Back Sleepers

  • Lightweight Sleepers – Back sleepers need more support, and those who weigh under 130 pounds should find the Cocoon does a good job of keeping their hips aligned.
  • Average Weight Sleepers – Average-weight people who rest on their back should get a good balance of pressure relief and support to keep the spine aligned, especially if they weigh around 170 pounds.
  • Heavyweight Sleepers – Heavy back sleepers are likely to sink too deeply into the Perfect Fit Foam layer, which can throw the spine out of alignment.

Stomach Sleepers

  • Lightweight Sleepers – Stomach sleepers who weigh under 130 pounds may experience this bed as firmer, which means they should get optimal support for the hips, preventing them from sinking too deeply into the mattress.
  • Average Weight Sleepers – Average-weight stomach sleepers who weigh closer to 150 pounds should like the mid-range firmness of the Cocoon Chill. However, those who weigh closer to 230 pounds may need a firmer bed.
  • Heavyweight Sleepers – Heavy stomach sleepers may feel their hips sinking into the mattress construction. This can be uncomfortable and can result in poor spine alignment.

Pressure Relief & Pain

The Cocoon Chill is an all-foam bed with a top layer that features memory foam. This highly popular material is celebrated for its ability to provide pressure relief to sleepers.

Furthermore, the top layer of memory materials is supported by a quicker-responding comfort foam and base underneath, so you should not feel that deep hug that can sometimes make people feel stuck in foam beds. With a medium-firm feel, this bed should be a great middle-ground option for most shoppers.

Back Pain – People with back pain need maximum support, especially in the lumbar area. If the hips sink too far in, the spine can fall out of alignment, which can easily result in even more pain. The Cocoon Mattress is on the firmer side, so it should provide good support and pain relief for average-weight people who struggle with back pain.
Hip Pain – Hip pain can make it difficult to fall asleep if you’re a side sleeper. The Cocoon Chill is on the firmer side, so it may be a bit too firm for some side sleepers, depending on their weight. The memory foam layer should allow enough sinkage, but if you’re more of a lightweight sleeper, you may not weigh enough to activate this layer.
Shoulder Pain – If you struggle with shoulder pain, you may want to consider sleeping on your back. The Cocoon Chill should provide sufficient support in the upper back area to help alleviate shoulder pain. However, significantly lightweight and heavyweight sleepers who reston their side may not get the same level of relief.


Along with pressure relief, a top-quality mattress should feature a solid support system. On a softer surface, heavier body parts will naturally sink deeper than lighter parts. When this happens, the spine can shift into an awkward position, which could eventually cause or worsen pain in the back or neck. However, stronger support layers can balance this out by preventing those heavier areas from dipping too much.

The Cocoon Chills tackles this first with the Responsive Comfort Layer, specifically designed to prevent sinkages, followed by the six-inch Essential Support base.

Motion Transfer

Motion transfer is important for couples, especially if one partner is a restless sleeper or frequently changes positions throughout the night. If partners have different sleeping schedules, motion isolation is crucial for getting uninterrupted rest.

The Cocoon Chill is made entirely out of foam, so you can expect an excellent level of motion isolation. The memory foam layer and the 2-inch responsive poly foam underneath do a good job of absorbing movement so that partners don’t wake each other up when tossing and turning.

happy woman is lying on her stomach on a cocoon chill bed

Temperature Regulation / Cooling

The Cocoon Chill Mattress is made with hot sleepers in mind, as it contains Phase-Change Technology which helps regulate the bed’s surface temperature. The material adapts and adjusts to your body temperature so that it doesn’t overheat. This is especially useful in the warmer months, but it also comes in handy if you sleep hot regardless of the time of year.

The cooling effect is also suitable for couples since sharing a bed can generate more body heat than those who are sleeping alone.

Performance for Couples

Couples usually prefer a mattress with motion-isolating abilities. You don’t want to feel your partner’s tossing and turning, which can potentially wake you up in the middle of the night. The same is true for those who share their bed with a child or a pet. The Cocoon Chill Mattress absorbs motion, making it a good option for couples. In addition, it has solid edge support, allowing couples to use the entire surface of the bed.

However, sexually-active couples may prefer a mattress with more bounce, as the Cocoon Chill isn’t the bounciest bed out there.

Preference-based Features

Exceptional Edge Support

Sleepers who need to maximize their mattress’s surface area will likely prefer a bed with good edge support. There should be some compression when you sit with your weight concentrated on the edge, but you should still feel supported while sleeping on the side.

Adjustable Base Compatible

The Cocoon Chill is compatible with adjustable bases.

Handcrafted in the USA

Construction: What’s Inside the Cocoon Chill?

The Cocoon Chill is an all-foam bed-in-a-box option from popular bedding brand Sealy, designed and assembled in the United States. You can use this mattress with the most solid foundations and supportive frames, including platforms, slats, and adjustable bases. The company sells its own foundations as well.

What separates the Cocoon Chill from the Classic model is the proprietary phase-change materials incorporated into the durable stretch-knit cover. Phase change technology absorbs heat away from your body when you are hot and returns it when you cool down, maintaining a comfortable temperature.

The Cocoon Chill’s construction is made of three separate foam layers and measures 10 inches tall.

  • Below the cover, you will find two inches of the company’s Perfect Fit Memory Foam, which is made to conform to your body for optimal comfort and pressure relief.
  • The middle of this mattress features a two-inch Responsive Comfort Foam layer. The foam is designed to reduce motion transfer across the bed and prevent the sleeper from sinking in too much. Preventing sinkage is good for spinal alignment because when heavier body parts such as the hips or stomach sink too far, this can throw off the spine’s alignment.
  • The base consists of a resilient six-inch Essential Support Layer. The foam at the bottom is denser than the ones above to provide support and durability.
Cocoon by Sealy Mattress Construction

Unboxing & Off-Gassing

The Cocoon Chill Mattress comes compressed and rolled into a box for easy shipping. This also makes it easy to carry from your door to the bedroom, although we suggest recruiting a friend or family member to help you because the package may be heavy depending on the bed size you choose. Once the mattress arrives, you can unpack it right on your foundation of choice.

There may be some off-gassing when you initially unbox this mattress, as this is common for mattresses made of foam. The smell should dissipate within 48 hours.


  • Eco-Friendly Certifications – The foams in this bed are CertiPUR-US® certified. CertiPUR-US® is a third-party program that ensures the foams meet rigorous health and safety standards. This means they don’t contain harmful substances like ozone depleters, PBDEs, heavy metals, formaldehyde, and phthalates. They should also have low volatile organic compound (VOC) emissions.

Noteworthy Updates:

  • The Chill is now available in a single Medium-Firm option, which is a good middle-of-the-road feel that should perform well for most sleepers.
  • Sealy has also upgraded the cooling materials of the mattress including enhancements to the foams as well as the cooling cover.

Coupons, Trials, Warranties, and Shipping

  • Shipping – Free shipping and returns are available within the continental U.S.
  • Trial – The company offers a 100-night trial period during which you can return the mattress if you find it doesn’t fit your needs.
  • Warranty – This bed comes with a 10-year limited warranty.
  • Return Policy – Returns are free and the company issues a refund only if you return the mattress within the trial period.

Sizes & Prices

SizeDimensions (inches)Price (w/o discount)
Twin38” x 74.5” x 10”$769
Twin XL38” x 79.5” x 10”$869
Full53” x 74.5” x 10”$969
Queen60” x 79.5” x 10”$1,239
King76” x 79.5” x 10”$1,539
Cali King72” x 83.5” x 10”$1,539
product image of cocoon
Get the Cocoon Chill Mattress
The Cocoon Chill has a 10-inch profile and should fit a range of sleepers thanks to its medium-firm feel.
Click the button below to get the Cocoon Chill Mattress.

Frequently Asked Questions

How Long Does the Cocoon Chill Mattress by Sealy Last?

The Cocoon Chill Mattress is made up of 10 inches of dense foam. The mattress should last five to eight years after which you’re advised to replace it. However, if you rotate the mattress regularly (and pair it with a supportive foundation), you can ensure maximum longevity.

Is the Cocoon Chill Worth it?

The Cocoon Chill features high-quality materials and is built to provide cooling, comfort, pressure relief, and motion isolation. All of these things combined make the mattress a high-value product, but even more so when you add in the 100-night trial and 10-year warranty to the deal.

Is the Cocoon Chill Mattress Made in the USA?

The Cocoon Chill Mattress is designed and handcrafted in the USA.

Sealy Cocoon Chill vs. Other Brands

Sealy Cocoon Chill vs. Nectar Memory Foam

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  • Phase-Change Technology
  • All-Foam Construction
  • 10-Inch Profile
nectar bed product image
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  • 365-Night Trial
  • 12-Inch Profile
  • Gel Memory Foam

Who We Recommend the Cocoon Chill For

  • Average-weight sleepers
  • Hot sleepers
  • Couples

Who We Recommend the Nectar Memory Foam For

  • People looking for bounce
  • Those in need of a longer trial period
  • Shoppers on a tight budget

Cocoon Chill vs. DreamFoam Essential

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  • 100-Night Trial
  • Mid-Range Firmness
  • 10-Year Warranty
Product image of DreamFoam Essential mattress
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  • Five Height Options
  • Open-Cell Technology
  • Multiple Firmnesses

Who We Recommend the Cocoon Chill For

  • Back sleepers
  • Lightweight stomach sleepers
  • People with hot flashes

Who We Recommend the DreamFoam Essential For

  • Those who like having options
  • Budget shoppers
  • People with pressure build-up

Cocoon Chill vs. Other Sealy Models

Cocoon Chill vs. Chill Hybrid

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  • All-Foam Mattress
  • Gentle Cradling
  • 500-Pound Weight Limit
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  • Classic Hybrid Construction
  • 12-Inch Profile
  • Targeted Support

Who We Recommend the Cocoon Chill For

  • Memory foam fans
  • Lightweight stomach sleepers
  • Couples

Who We Recommend the Chill Hybrid For

  • People with back pain
  • Fans of the hybrid design
  • Sleepers in need of edge support

Overall Summary

A supportive and comfortable memory bed, the Cocoon Chill Mattress is designed to keep you cool while you sleep.

Side Sleeping Icon

Side Sleepers


We rated the Cocoon Chill at a four for side sleepers. As a medium-firm bed, lightweight individuals under 120 pounds may feel this mattress is still too hard. However, this bed scores well as most sleepers should feel the top foam layer relieves the pressure that concentrates on hips and shoulders when they sleep in this position.

Back Sleeping Icon

Back Sleepers


The Cocoon earned a four because the medium-firm feel may not provide enough back support for significantly heavier individuals. Overall, though, this bed earned points for most back sleepers, who should feel the supportive base foam hold their spine in straight alignment.

Stomach Sleeping Icon

Stomach Sleepers


Stomach sleepers with higher weight considerations may prefer a firmer model, which is why it scored a four here. However, the Chill did score well for average and lightweight stomach sleepers, as the supportive foam should prevent their midsection from sinking too much.

Combination Sleeping Icon

Combination Sleepers


We gave the Chill a four for combination sleepers because this bed may not accommodate heavier individuals, especially if they rotate between their back and stomach. However, the bed scores well for most sleepers, thanks to the universal medium-firm feel.

Couples Icon



The bed earned a four out of five for couples because some partners may prefer a mattress with more bounce for sexual activities. That being said, this bed did earn other positive marks for couples thanks to its edge support and motion isolation, both of which are beneficial for those sharing a bed.

Heavy Sleepers Icon

Heavy Sleepers


We rated the Chill at a three for heavy sleepers because individuals who carry more weight tend to enjoy a firmer mattress that allows them to feel more supported. Heavy sleepers who exclusively sleep on their stomach, though, may do okay on this mattress, which is why it earned some positive marks.

Light Weight Sleepers

Lightweight Sleepers


We gave the Chill a four for lightweight sleepers because those who only rest on their side may still find this bed too firm. This model scored well for lightweight back and stomach sleepers, though, who should feel substantial support and comfort in these positions.

Light Weight Sleepers

Average Weight Sleepers


The Cocoon Chill Mattress should be a good fit for average-weight people but this depends on their preferred sleeping position and exact weight. The mid-range firmness and memory foam construction should conform to your body well enough, which promotes a good balance of pressure relief and support, especially for sleepers who weigh around 180 pounds.

Overall Value


The Chill earned an overall four from us because it may not be firm enough for heavier set individuals, particularly those over 250 pounds. However, this bed did score well because its universal firmness combined with good edge support and motion isolation should make it a good fit for most sleepers.

Our Verdict

We think the Cocoon Chill is a good purchase for those seeking a bed that prioritizes pressure relief and cooling. With a memory foam layer combined with an additional comfort layer, folks who need relief from sensitive pressure points should appreciate this mattress.

We also feel this bed is a good fit for combination sleepers. The Chill’s medium-firm feel should accommodate multiple sleep positions.

We do not feel this bed is a good fit for heavier sleepers who weigh more than 250 pounds. These individuals will likely prefer a mattress specifically designed for larger frames that can support higher weights.

product image of cocoon
Get the Cocoon Chill Mattress
The Cocoon Chill has a 10-inch profile and should fit a range of sleepers thanks to its medium-firm feel.
Click the button below to get the Cocoon Chill Mattress.

Jill Zwarensteyn is the editor for Sleep Advisor and a certified sleep science coach. She is enthusiastic about providing helpful and engaging information on all things sleep and wellness.

Based in Los Angeles, she is an experienced writer and journalist who enjoys spending her free time at the beach, hiking, reading, or exploring new places around town.

She’s also an avid traveler who has a personal goal of being able to successfully sleep on an airplane someday.

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