Cocoon by Sealy Mattress Review

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The Cocoon mattress is Sealy's first 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 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 above.

Synopsis

Key Facts – Cocoon by Sealy Mattress

Mattress Type

Memory Foam over Foam

Price (Queen)

$799

Delivery

Free delivery to your door

Return Policy

100-day trial, full refund with proof of donation

Warranty

10 years. Indentation coverage: 1"+

Country of Manufacture

United States

Thickness

10 inches

Weight (Queen)

64.4 pounds

 

GoodBed's Take – Who is the Best Match for a Cocoon by Sealy 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'

 

FEEL Classifications

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
Softness Level (Cocoon Soft)
(1=Least Soft, 9=Most Soft)
5 Medium
Cushioning Depth (Cocoon Firm)
(1=Shallowest, 9=Deepest)
3 Shallower than average
Cushioning Depth (Cocoon Soft)
(1=Shallowest, 9=Deepest)
5 Medium
Response Rate
(1=Slowest, 9=Fastest)
3 Very slow response, with some bounce

 

BACK SUPPORT Rating (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.

Cocoon Firm:

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

 

Cocoon Soft:

Weight Range Back Sleepers Side Sleepers Stomach Sleepers
Lighter <150 lb 9 9 7
Average 150 to 200 lb 9 9 7
Above Average 200 to 250 lb 9 9 6
Heavier >250 lb 9 8 5

 

PRESSURE RELIEF Rating (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 Firm version Soft version
Lighter <150 lb 8 9
Average 150 to 200 lb 7 9
Above Average 200 to 250 lb 7 9
Heavier >250 lb 6 8

 

OTHER GoodBed Ratings

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 Average for a foam mattress
Edge Support 2 Poor
Ease of Repositioning 6 Average for memory foam
Green Features 5 Does have some safety certifications
Adjustable Base Compatibility 7 Good compatibility
Overall Value 7 Good value

 Cocoon Mattress by Sealy

Overview: Cocoon Mattress

Last Updated: August 2018

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. It enters a world with a LOT of competition, so we were eager to see how it performs in our testing.

The Cocoon mattress is a 10" bed with relatively simple construction. Available in two softness levels, the Firm version features a 2" layer of memory foam atop an 8" layer of standard polyurethane foam. The similar Soft version features a 2" layer of the same memory foam, then 2" of a soft polyurethane foam, supported by a 6" block of polyurethane support foam. The two versions come wrapped in the same soft and stretchy cover. The company will even allow a one-time free exchange if you think you ordered the wrong version.

An upgrade option is available for the cover; and extra $150 gets you the "Chill" cover, which includes some phase-change material intended to help regulate heat and keep you cooler. We'll speak more about that further below.

We found the memory foam featured in the Cocoon 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 by Sealy mattress.

We tested both of the versions of this mattress, called the "Firm" and the "Soft." Interestingly, however, we found the softness difference to be a lot more subtle than the names would suggest. On our scale, we would class the "Firm" version as a Medium Firm, while we found the "Soft" version to be about a Medium in our view. We noted more of a difference in cushioning depth, and we'll get to that in our detailed ratings below.

We found back support, especially for back sleepers, to be very good in our tests, and we think both the Firm and the Soft versions are supportive and promote very good spinal alignment. If you are primarily a back sleeper considering the Cocoon by Sealy, the choice might come down to preference and whether you prefer more of a floating on top of your mattress feeling (Firm version) or prefer to sink in a bit more (Soft version).

The two versions were more different for side and stomach sleeping. We felt side sleepers would be better served in terms of support and pressure relief by the Soft version, while those who sleep on their stomachs would be better supported by the Firm version.

Motion isolation with both versions 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 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 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.

 

Construction

Mattress type:  Memory Foam over Foam

Made In:  United States

Mattress Thickness:  10”

Mattress Weight:  64 pounds (queen size)

 

Layers

The Cocoon by Sealy mattress is a 10″ thick mattress comprised of either 2 or 3 layers, depending on the version (listed below from top to bottom):

Cocoon Firm:

  • 2" memory foam
  • 8" polyurethane support foam

Cocoon Soft:

  • 2" memory foam
  • 2" soft polyurethane comfort foam
  • 6" polyurethane support foam
Construction for the Cocoon bed is simple: memory foam on top and polyurethane foam on the bottom. Both versions of the mattress share the same 2" memory foam layer, and the same polyurethane form support foam. The difference for the Soft version is a 2" layer of softer polyurethane foam that as you'll see in our review provides somewhat deeper cushioning.
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).

 Cocoon Mattress by Sealy Foam Layers

Cover

The layers of the Cocoon by Sealy mattress are wrapped in a stretchy and soft cover that seemed well made and sturdy.

An optional upgrade is Cocoon's "Chill" cover, which the company says can help keep you cooler with the inclusion of phase-change fibers. That's a $150 option when you order the Cocoon bed. See the "temperature" section below on our views about the Chill cover.

 Cocoon Mattress by Sealy Cover Closeup

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 evaluated both the Cocoon Firm and the Cocoon Soft, and found them to be more similar than the names would suggest. We found the "Firm" to be about a Medium Firm on our scale, while the "Soft" version came it at about a Medium.

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

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

 

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 tried both versions of the Cocoon mattress and felt there was a bigger difference in cushioning depth than softness. with the firm version, we felt a lot more of the 'floating on top' feeling, and with the soft version, more of a medium level of cushioning.

Cushioning Depth (Cocoon Firm)
(1=Shallowest, 9=Deepest)
3 Shallow cushioning
Cushioning Depth (Cocoon Soft)
(1=Shallowest, 9=Deepest)
5 Medium cushioning

Cocoon Mattress by Sealy Cushioning Depth 

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?

Both versions of the Cocoon mattress have the same 2" of memory foam on top, and it's 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 mattress does have a bit (it's personal preference whether you like some bounce in your mattress or not). So the Cocoon by Sealy mattress is pretty interesting--a combination of very slow response but with some bounce as well.

Response Rate
(1=Slowest, 9=Fastest)
3 Very slow response, with some 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 two versions of the Cocoon mattress:

Cocoon Firm:

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

 

Cocoon Soft:

Weight Range Back Sleepers Side Sleepers Stomach Sleepers
Lighter <150 lb 9 9 7
Average 150 to 200 lb 9 9 7
Above Average 200 to 250 lb 9 9 6
Heavier >250 lb 9 8 5

 

Back Sleepers:

Our tester felt very supported in this position, on both the firm and soft versions of the Cocoon by Sealy mattress. 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 opinion differed based on the mattress version. with the firm Cocoon mattress, our tester didn't feel that his shoulders sank enough into the mattress, forcing a curve in his spine. But on the soft Cocoon mattress, he felt much better supported in the side-sleeping position.

Stomach Sleepers:

It was the opposite for stomach sleeping. On the firm version of the Cocoon bed, our tester felt his hips well supported, but on the soft version, they sank in too much, creating what we call a "hammocking" effect that can create too much arch in the back, and lead to discomfort or pain down the road. We felt that feeling on the soft version would be exacerbated for individuals heavier than our 200-lb. tester.

 

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 mattress:

Weight Range Firm version Soft version
Lighter <150 lb 8 9
Average 150 to 200 lb 7 9
Above Average 200 to 250 lb 7 9
Heavier >250 lb 6 8

 

We found pressure relief for the Cocoon bed to be very good for the Cocoon Soft. For the firm version, however, we felt all but the lightest individuals would not find enough pressure relief from those top 2" of memory foam. Overall, we felt the Soft version would be more appropriate for those who sleep predominantly on their sides.

 Cocoon Mattress by Sealy side sleeping

Other Characteristics

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 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.

With the Soft version, you sink in more, so there's more chance of feeling hot, in our view.

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, the $150 optional "Chill" version of the mattress, with a cover that incorporates phase-change fibers. It's supposed to feel cool to the touch. When compared to the regular cover, we did think the Chill cover felt slightly cooler. When we put a sheet on top of both mattresses, however, we noticed very little difference. Overall, we are unsure that the Chill cover offers enough benefit to justify a $150 added expense.

Stays 'Cool' Rating 5 /10 Average for foam

 

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

 Cocoon Mattress by Sealy Edge Support

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 6 /10 Average for memory foam

 

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 mattress by Sealy, the company makes no claims about the use of natural materials. However 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.

Green Rating 5 /10 Does have some safety certifications

 

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 7 /10 Good compatibility

 

Price, Value & Longevity

What It Costs

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. 

Size Dimensions Mattress Foundation GoodBed Discount
Twin 38" x 74.5" x 10" $399 $249 $100 off
Twin XL 38" x 79.5" x 10"  $449 $249 $100 off
Full (Double) 54" x 74.5" x 10" $649 $249 $100 off
Queen 60" x 79.5" x 10" $799 $299 $100 off
King 76" x 79.5" x 10" $999 $349 $100 off
California King 72" x 83.5" x 10" $999 $349 $100 off

 

What You’re Getting

The Cocoon 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 We Think It Will 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 queen size Cocoon mattress is $799, a price that’s right in line, or even a little less, compared to 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 value

 

Delivery, Returns, & Warranty

Delivery

  • 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.

 

Returns

  • 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

  • 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. See: Cocoon warranty

 

Summary: 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 CocoonBySealy.com.

 

Final Note

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