The Cocoon by Sealy Mattress (Chill Model) Review – Updated for 2022

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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. This mattress shares the same internal construction with the Cocoon Classic model but has proprietary cooling technology integrated into its cover.

Our in-depth look at the Cocoon Chill by Sealy scores the bed on a system based on characteristics like sinkage, support, cooling, and pressure relief.

Keep reading to find out more, or you can bypass the details and go right to its scoring and verdict.

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.

Excellent Matches For Cocoon Chill

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

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

Possible Cocoon Chill Considerations:

  • Not much bounceThough some bounce comes from the thick polyurethane foam base, which will support your weight and help you navigate the bed’s surface, it will not 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, people with much higher weight considerations may prefer a firmer bed to keep their spine well-aligned.

Weight Considerations

The Cocoon Chill mattress can hold a total of 500 pounds – or 250 pounds 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 premium quality foams should leave them feeling supported while on the bed. The 500-pound weight limit also applies to the hybrid version of this bed.

Folks weighing over 250 pounds may find they fall further into the bed, leaving them feeling stuck and uncomfortable. In this case, we would recommend going with a brand that caters to heavier individuals with more substantial support layers.

For those who weigh lighter, the medium-firm feel of this bed should be a good fit that won’t leave you feeling as though you are sleeping on a hard surface. However, strictly side sleepers under 120 pounds may need a softer option.

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 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

First Impression: How Does It Feel?

The Cocoon Chill is shipped from the company’s manufacturing plant in Mississippi. The cover is soft, 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.

Firmness Scale: 6/10 (Medium-Firm)

Mattress Firmness Disclaimer Mattress Firmness Disclaimer Cocoon Firmness Scale

Pressure Relief

As you lie down, your body weight can accumulate in heavier areas such as the hips, lower waist, and shoulders. Unfortunately, this build-up of pressure can sometimes become painful. For this reason, having a bed that is constructed to relieve sensitive pressure points should help immensely, allowing you to sleep more soundly and pain-free.

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. Shoppers in search of quality pressure relief will likely enjoy a bed designed with memory foam.

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.


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.

Preference-based Features

Motion Transfer

Memory foam performs exceptionally well when isolating motion because of its ability to absorb movement at its point of impact. With the top layer of memory materials, the Chill absorbs most motion at the source and allows very little to travel across the bed. If you are an active sleeper and worry about disturbing your partner, this mattress is a great choice.


The biggest difference between the Cocoon Chill and the Classic is the addition of Phase Change Technology in the cover to help regulate the temperature and prevent overheating. For folks who need more cooling, the Chill will be the better option.

Exceptional Edge Support

Sleepers who need to maximize their mattress’s surface area will likely prefer a bed with good support around the perimeter. There will 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


  • Eco-Friendly Certifications – This product is CertiPUR-US certified, meaning the foams have been evaluated by a third-party organization that looks for levels of harmful materials, such as mercury, lead, or chemicals that deplete the ozone.
CertiPur Logo

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.
  • Warranty - This bed comes with a 10-year limited warranty.
SizeDimensions (inches)Price (w/o discount)
Twin38” x 75” x 10”$769
Twin XL38” x 80” x 10”$869
Full53” x 75” x 10”$969
Queen60” x 80” x 10”$1,239
King76” x 80” x 10”$1,539
Cali King72” x 84” x 10”$1,539

Cocoon Chill vs. Casper Original

If you are on the fence about the Cocoon Chill, we will compare this mattress to a similar model from a different brand, the Casper Original. Comparing these two brands should give you a better idea of how the Chill measures up to its competition.

The beds share similar attributes. Both are made with memory foam and have a medium-firm feel. Additionally, they each share a 100-night trial period and a 10-year warranty. Despite these similarities, the Cocoon has a strong advantage with its price point, significantly cheaper than Casper.

While the Cocoon Chill focuses on keeping sleepers cool through its cover, the Casper uses a comfort foam called AirScape™ to prevent overheating during the night. Each bed shares a three-layer foam construction.

The Casper may be slightly more appealing to back sleepers due to its zoned support system in the mattress’s core, which aims to improve spinal alignment.

Casper also offers more flexibility to international customers; the mattress can be shipped and returned free of charge in both the United States and Canada. Casper is also ranked slightly better for back, combination, and lightweight sleepers than the Cocoon Chill.

Overall Summary

Widely recognized brand Sealy enters the bed-in-a-box space with a comfortable and supportive memory bed. The Chill model 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 relieve 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.

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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.

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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

Light-Weight Sleepers


We gave the Chill at 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.

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. 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, with its medium-firm feel, should accommodate multiple sleep positions.

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


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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