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Cocoon Chill Mattress Review

Last updated on June 22, 2022

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The Cocoon Chill mattress is Sealy's online-only mattress, made of memory foam over foam. It competes in a crowded field, so how does it compare?

Short on time? Click here to jump down to the review summary

Note: The Cocoon Chill mattress, a memory-foam over foam bed, comes from Sealy, a company with a history of more than a century making mattresses. The Cocoon model is the first product that Sealy has sold directly to consumers over the internet.

If you’d prefer to watch rather than read, check out our full Cocoon mattress video review.

Table of Contents

Nobody does more in-depth mattress reviews than GoodBed — which means there's a lot of information here! Use the links in this table of contents to quickly jump to the sections of this review that interest you most.

Summary Overview of GoodBed's findings and conclusions about this product
Materials & Construction Mattress Type, Layers, Cover
Comfort & Feel Ratings Softness, Cushioning Depth, Memory Feel, Bounce
Back Support + Pressure Relief Ratings By sleeper weight and sleep position
Feature Ratings Motion Isolation, Temperature, Edge Support, Ease of Repositioning, Natural vs Chemicals, Adjustable Base Compatibility
Price, Value & Longevity Cost, Discounts, Durability, Overall Value
Other Factors to Consider Delivery, Returns, Warranty
Bottom Line Who is the best/worst match for this mattress?

Summary: Is the Cocoon Chill a Good Mattress?

The Cocoon bed is Sealy's first entrant into the online mattress world. Instead of buying it in a mattress or department store, as you would other Sealy beds, the Cocoon is available exclusively online.

Note: When we reviewed the Cocoon memory foam mattress, the addition of a "chill" cooling cover was an extra-cost option. Now the cooling cover comes standard, reflected in a name change from "Cocoon" to "Cocoon Chill". The inner construction of the mattress is identical to the version we reviewed.

Sealy has now added a hybrid version, called the Cocoon Chill Hybrid, which substitutes a pocketed coil unit for the foam support core.

The Cocoon Chill mattress is a 10" bed with relatively simple construction of layers of foam and memory foam, covered by the "chill" cover, which includes some phase-change material intended to help regulate heat and keep you cooler.

We found the memory foam featured in the Cocoon Chill mattress to be particularly slow responding; when we pressed down into the bed with our hands, it took a full 10 seconds for the mattress to return to its shape. If you like that feeling of slowly melting into the bed, you might enjoy the Cocoon Chill mattress. It comes in just one softness level, a medium-firm. (When we first tested the Cocoon mattress, it also came in a soft, but that version has been since discontinued.)

We found back support, especially for back sleepers, to be very good in our tests. And we think most stomach sleepers would also be well served. For those who sleep primarily on their sides, it might be a little firm, however.

Motion isolation was a highlight in our tests, and we felt the Cocoon mattress would be a solid choice if you tend to be disturbed by a partner's movements in bed.

It fell short, however, in our tests for edge support. Our tester felt himself slowly sliding off the bed when laying on the edge, so if you find yourself often pushed to the side of your mattress by kids or pets, that might be a concern for you. And because of the type of memory foam in the Cocoon Chill bed, we felt it harder to move around and change sleeping positions, typically something that goes with the territory in mattresses with this kind of slow-responding foam.

From a value standpoint, the Cocoon Chill mattress sits right in the middle of the competition among all-foam beds, but if you like the idea of choosing a mattress from a company with a long history in the mattress industry, and one that's likely to be around for the lifetime of your bed, that could tip the scales assuming that its other performance and preference features suit your needs.

You can use the Cocoon bed on any suitable and supportive foundation. Sealy sells a matching foundation, but it's not required.

Read on for our detailed report and be sure to check out the video to see this mattress in action as we put it through our tests. You can always visit the company's website for more on the Cocoon by Sealy.

Bottom Line: Who is the Best Match for a Cocoon Chill Mattress?

BEST if you:

  • Love the feel of extra slow-responding memory foam
  • Are sensitive to a partner's movements
  • Want to buy from an established company

NOT IDEAL if you:

  • Tend to sit or sleep on the edge of your bed
  • Like to sink deeply into your mattress
  • Are concerned about 'sleeping hot'


Comfort & Feel

These are the "preference-based characteristics" of a mattress. No classification here is better or worse – they are strictly a matter of your personal preference.

Softness Level (Cocoon Firm)
(1=Least Soft, 9=Most Soft)
4 Medium-Firm
Cushioning Depth (Cocoon Firm)
(1=Shallowest, 9=Deepest)
3 Shallower than average
Memory Feel
(1=Least, 9=Most)
8 Lots of memory feel
(1=Least, 9=Most)
3 Very little bounce


Back Support (by Sleeper Type)

No mattress will provide equally good spinal alignment (a.k.a., back support) for every sleeper. Here's what to expect in terms of spinal alignment on this mattress – by sleeper weight and sleep position.

Weight Range Back Sleepers Side Sleepers Stomach Sleepers
Lighter <150 lb 9 6 9
Average 150 to 200 lb 9 6 9
Above Average 200 to 250 lb 9 7 9
Heavier >250 lb 9 7 8


Pressure Relief (by Sleeper Type)

The pressure relief offered by a mattress – especially important for side sleepers – will vary based on a sleeper's weight and body shape. Here's how we size up the pressure relief capabilities of this mattress.

Weight Range GoodBed Rating
Lighter <150 lb 7
Average 150 to 200 lb 7
Above Average 200 to 250 lb 7
Heavier >250 lb 6


Other Features

These are the "priority-based characteristics" of a mattress. Ratings here indicate where this mattress has strengths or weaknesses – however the importance of these features will depend entirely on your personal priorities.

Motion Isolation 9 Excellent
Stays 'Cool' 5 Okay
Edge Support 2 Poor
Ease of Repositioning 7 Good
Green Features 4 Fair
Adjustable Base Compatibility 8 Very good
Overall Value 7 Good


Key Facts – Cocoon Chill Mattress

Mattress Type

Memory Foam over Foam


Check today's prices


Free delivery to your door

Return Policy

100-day trial, full refund with proof of donation


10 years. Indentation coverage: 1"+

Country of Manufacture

United States


10 inches

Weight (Queen)

64.4 pounds

Materials & Construction

What is in a Cocoon Chill Mattress?

Overall, we classify the Cocoon Chill as a "Memory Foam over Foam" construction type. It is a 10″ thick mattress comprised of 3 layers (listed below from top to bottom):

  • 2" "Perfect Fit" memory foam
  • 2" polyurethane comfort foam
  • 6" polyurethane support foam
Construction for the Cocoon Chill bed is simple: memory foam on top and polyurethane foam on the bottom.
Sealy has chosen not to disclose the densities of the foams used in the Cocoon bed. We typically use foam densities to estimate longevity and compare the bed to others. Our best guess, based on our experience, is that the memory foam is a 3-lb. density foam, a bit lower than we usually see on memory foam beds. The Support layer, we believe, is about a 2-lb. density, which is a little higher than we usually see (a 1.8-lb. density is fairly typical).



The layers of the Cocoon by Sealy mattress are wrapped in a stretchy "chill" cover, which the company says can help keep you cooler with the inclusion of phase-change fibers. See the "temperature" section below on our views about the Chill cover.



Comfort & Feel

There are three aspects that make up our assessment of comfort and feel. We call these "preference-based characteristics" because no rating here is better or worse – rather, the attributes that are most desirable to you will be determined solely by your personal preferences. We apply the same classification standards to each mattress so you can more easily compare apples to apples.

Softness ( what’s this )

Keep in mind that what mattress companies call “firm” or “soft” is a purely a preference. All mattresses should be supportive and promote healthy spinal alignment. Whether a mattress is fluffy and squishy (what mattress companies call soft or plush), or less so (what companies call firm), is purely down to your personal needs and preferences.

We found the Cocoon Chill to be about a Medium Firm on our scale.

Not sure what softness is best for you? Take our Mattress Match Quiz and find out.

Softness Level
(1=Least Soft, 9=Most Soft)
4 Medium-Firm


Cushioning Depth ( what’s this )

This refers to how deeply you sink into the mattress or feel cradled or hugged, versus a feeling of floating on top of the bed. We felt a lot more of the 'floating on top' feeling.

Cushioning Depth
(1=Shallowest, 9=Deepest)
3 Shallow cushioning


Responsiveness ( what’s this )

Responsiveness refers to how quickly a mattress recovers its shape after being compressed. When you press your hand into the mattress, for instance, then remove it, does it take several seconds for the mattress to return to flat, or does it recover immediately?

The top comfort layer is a particularly slow-responding memory foam. When we pressed down on the bed, it took a full 10 seconds for the mattress to return to shape.

Typically with all-foam beds, there isn't a lot of bounce, but the Cocoon Chill mattress does have a tiny bit (it's personal preference whether you like some bounce in your mattress or not). If you are really a fan of bounce, however, you might want to check out the Cocoon Chill Hybrid, which substitutes a pocketed coil unit for the standard Cocoon Chill's support foam layer.

Memory Feel
(1=Least, 9=Most)
8 Lots of memory feel
(1=Least, 9=Most)
3 Very little bounce


Back Support & Pressure Relief

The two things that you should always be sure to get from your mattress are spinal alignment (commonly thought of as "back support") and pressure relief. Unfortunately, no mattress will deliver these two things equally well for all sleepers. In particular, spinal alignment and pressure relief capabilities will vary across sleepers with different weights, body shapes, and sleep positions. To help you determine how this mattress will perform for you, we break down our spinal alignment and pressure relief assessments by sleeper type.

In our evaluations, the Cocoon mattress offered very good back support, but we did find it depended on your predominant sleeping position which version would be better. For most everyone, and on both versions, we felt that back sleepers would be well supported in particular.


Spinal Alignment

The key to good back support is maintaining proper spinal alignment while you sleep. This means that the mattress should hold your spine in roughly the same position it's in when you're standing. The ability of a given mattress to do this will generally depend on your weight, sleep position, and body shape.

Here is how we break down the spinal alignment of the Cocoon mattress:

Weight Range Back Sleepers Side Sleepers Stomach Sleepers
Lighter <150 lb 9 6 9
Average 150 to 200 lb 9 6 9
Above Average 200 to 250 lb 9 7 9
Heavier >250 lb 9 7 8

Back Sleepers:

Our tester felt very supported in this position. His hips sank into the mattress, creating good spinal alignment, and his lumbar area felt supported. We felt that most people would feel similarly well supported in this position.

Side Sleepers:

When it came to side sleeping, our tester didn't feel that his shoulders sank enough into the mattress, forcing a curve in his spine.

Stomach Sleepers:

For stomach sleeping, our tester felt his hips well supported, and we think it would be a good choice for most stomach sleepers in average weight ranges.


Pressure Relief

When a mattress pushes back against your body with too much force in a concentrated area, the result can be pain, soreness, loss of circulation, excessive tossing, and other problems. In general, such "pressure points" are of greatest concern for side sleepers, since that's the position in which your body's weight is distributed over the smallest surface area. To find the right mattress for your needs, keep in mind that the pressure-relieving capabilities of any given mattress will vary depending on the sleeper. Factors like your weight and body shape (e.g., broader shoulders and/or hips) will determine how far you sink into the mattress, and the pressure relief offered by that mattress will vary widely at different depths.

Here's how we sized up the pressure relief of the Sealy Cocoon Chill mattress:

Weight Range GoodBed Rating
Lighter <150 lb 7
Average 150 to 200 lb 7
Above Average 200 to 250 lb 7
Heavier >250 lb 6


We found pressure relief for the Cocoon Chill to be good, but not the very best, with just 2" of premium memory foam on top.



Other Features

Beyond the preference-based characteristics of comfort and feel, and the body matching for spinal alignment and pressure relief, a mattress will have a number of other attributes that can make it a better or worse choice for you. We call these "priority-based characteristics" because they are areas in which a mattress can be better or worse, but that will have differing amounts of importance to each sleeper. So, determining how much importance to give to these features will be entirely a matter of your own personal priorities. As always, we apply the same ratings standards to each mattress so you can more easily compare apples to apples.


Motion Isolation ( what’s this )

With a bowling pin standing upright on the Cocoon bed, we dropped a bowling ball on it to gauge how movements on one side of the mattress might be transferred to other areas. The pin barely moved.

In general, foam and memory foam beds are good choices if you are easily disturbed by a partner's movements, and the Cocoon Chill mattress is no exception.

Motion Isolation Rating 9 /10 Excellent


Temperature ( what’s this )

Memory foam has a reputation for heat retention, so this is always something we examine with foam beds. In the case of the Cocoon mattress, we think most people are unlikely to feel hot on the Firm version because you float more on top of the mattress. That means more of your body is exposed to the air.

If overheating in bed is an issue for you, and you’ve experienced it with other mattresses, other models have features that are specifically intended to address this, and a foam bed likely is not your best choice.

Sealy does have an upgraded cover meant to address this, with its "chill" cover that incorporates phase-change fibers. It's supposed to feel cool to the touch. We did think the Chill cover felt slightly cooler than a standard cover, but when we put a sheet on top, we noticed very little difference. Overall, we don't think the cooling cover will make a huge difference for those with a known issue of sleeping hot.

Stays 'Cool' Rating 5 /10 Okay


Edge Support ( what’s this )

Foam mattresses aren’t typically very supportive along the very edge of the mattress—important if you like to sit on the edge of the bed, or if you tend to sleep along the edge. The Cocoon bed was no exception. When laying on the side of the bed, our tester felt himself sliding right off, and as the memory foam warmed under his body, the effect was even more pronounced.

If you tend to really use the sides of your mattress, there are better choices.

Edge Support Rating 2 /10 Poor


Ease of Repositioning ( what’s this )

Ease of movement can also be an issue with memory foam especially the type of slow-responding memory foam used in the Cocoon mattress. Our tester felt it did take effort to move from position to position with the Cocoon mattress, but since there is only 2" of memory foam atop the bed, he did not find it overly cumbersome.

Repositioning Rating 7 /10 Good


Green Features ( what’s this )

For mattress shoppers concerned with the use of natural materials, sustainable manufacturing practices or the like, we offer our subjective evaluation of any efforts taken by the company to make the mattress more green, healthy, or safe. 

In the case of the Cocoon Chill mattress by Sealy, the company makes no claims about the use of natural materials. All of its foams are petroleum based, and chemical glues are used to hold the mattress together.

All of the foams used are certified to the CertiPUR-US standard, which verifies that a material has low VOC off-gassing as well as a lack of chemicals and other substances regulated by the CPSC. This is a very common certification today that we see from almost all mainstream companies.

Green Rating 4 /10 Fair


Adjustable Base Compatibility ( what’s this )

We did not specifically test the Cocoon mattress with an adjustable base. However, the company says that it may be used with one.

Adjustable Base Compatibility 8 /10 Very good


Price, Value & Longevity

How Much Does a Cocoon Mattress Cost?

Prices shown are list prices. Remember that GoodBed keeps our site current with the best available discounts on all online mattresses, many of which are exclusive discounts for our readers. 


What Are You Getting?

The Cocoon Chill by Sealy is a 10" memory foam over foam mattress made by a company with a long history in the mattress business. It competes against a number of similar foam mattresses in its price range, but the Cocoon does have a particularly slow-responding memory foam layer on top. So if you really want that slow, melting-into-the-bed feeling of memory foam, the Cocoon does have that characteristic.


How Long Will the Cocoon  ChillMattress Last?

When it comes to estimating the comfort lifespan of a mattress, we tend to use foam density as our best, albeit imperfect, predictor of how long a foam will retain its shape and resiliency. In the case of the Cocoon mattress, Sealy has chosen not to disclose the densities used. Based on our experience, we can estimate the top memory foam to be about a 3-lb. density, which is a little low. If we had any concerns about compression, it would be that this top layer could soften prematurely compared to a denser foam. Sealy does warrant body impressions over 1" for a 10 years, however, so that should give some assurance.


Overall Value

Pricing for the Cocoon mattress is right in line, or even a little less, than other all-foam mattresses sold exclusively online. If its performance and preference features fit your needs, then we think it is a solid value. We have our doubts about the value of the optional "Chill" cover, however, given that we perceived little difference between it and the regular cover on the Cocoon bed.

Value Rating 7 /10 Good


Other Factors to Consider


  • Free delivery to door

Cocoon includes free delivery via UPS, which is not particularly unusual among its competitors. The Cocoon bed comes in a big box; the queen size mattress weighs almost 65 pounds.



  • 100-day trial period
  • Full refund with proof of donation

Cocoon offers buyers a 100-day trial period. Returns within the trial period are free, but in most cases you'll need to provide proof of donation to a charity. When you call to initiate a refund, the company will outline your options based on your location. See: Details on Cocoon returns



  • Warranty Length: 10 years
  • Indentation Coverage: 1” and above

One of the biggest, if not THE biggest complaints about any mattress from consumers regards body impressions—the inability of a mattress to spring back, eventually creating a low spot/sinkhole in the mattress. As such, mattress warranties all contain a term defining how big a sag or ‘body impression’ (measured when no one is on the mattress) is considered a defect, and thus covered under the warranty. The industry standard for mattresses is generally between ¾” and 1.5”. Cocoon has chosen to cover indentations that meet or exceed 1” which is average among foam beds. Practically speaking, that means any softening or sagging would need to be at least that deep before the warranty would offer you protection.

Should your mattress qualify for warranty repair or replacement, the purchaser is on the hook for any shipping fees, no matter how long you've owned the mattress. See: Cocoon warranty


Bottom Line: Is the Cocoon Mattress Right for You?

The Cocoon by Sealy mattress is an all-foam bed made by a company with a long and stable history in the industry. Here’s who we think the mattress is best for, based on our evaluation.

BEST if you:

  • Love the feel of extra slow-responding memory foam
  • Are sensitive to a partner's movements
  • Want to buy from an established company

NOT IDEAL if you:

  • Tend to sit or sleep on the edge of your bed
  • Like to sink deeply into your mattress
  • Are concerned about 'sleeping hot


Is the Cocoon mattress right for you? Take our Mattress Match Quiz to find mattresses that fit your needs, based on your preferences and price range. 

Looking for more on the Cocoon mattress from Sealy? Visit


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