Cocoon Chill Mattress Review

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 pocket spring 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.

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.

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'

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

Comfort and Feel

The “feel” characteristics of a mattress cannot be universally better or worse. They can only be more or less desirable to you, based on your personal preferences. For this reason, we call these “preference-based” attributes. Our ratings here are based on objective measurements that we apply to a consistent scale for products from all brands.

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.

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.

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 pocket spring unit for the standard Cocoon Chill's support foam layer.

Back Support

The key to good back support is for the mattress to support your spine in a “neutral” position while you sleep, meaning that the shape of your spine is roughly the same as when you're standing. The ability of any given mattress to do this will vary by sleeper, depending on its “fit” for your weight, body shape, and preferred sleep position(s).

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:

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

Inadequate pressure relief from your mattress results in “pressure points,” which can be a source of pain, soreness, loss of circulation, restlessness, and other problems. Pressure relief requirements will vary be sleeper, with side sleepers needing the most. Likewise, the amount of pressure relief that a given mattress provides will also vary by sleeper, depending on its “fit” for your weight and body shape.

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.

Performance Features

With the “features” of a mattress, performance will tend to be consistent across all sleepers – without regards to your body type or preferences. However, these attributes have differing levels of importance to each sleeper, which is why we consider them “priority-based” characteristics.

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.

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.

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.

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.

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.

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.

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):

Durability, Warranty & Value

The “value” of any mattress is both subjective and personal – reflecting how well it meets that person’s unique sleep needs and preferences, relative to their budget. As a result, our ratings in this area are focused on more objective factors like quality and 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.

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.

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.

Other Factors to Consider

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