Review of The Cocoon by Sealy Mattress (Chill Model) – Updated for 2021

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The Cocoon Chill comes from Sealy, which is one of the most recognizable names in the mattress business and was established in 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 their 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.

This model comes in two firmness levels, but our review will focus on their soft version, which we think will offer the most versatile accommodation.

Keep reading to find out more, or bypass the details and go right to its scoring and summary section.

You will love Cocoon Chill if you:

  • Sleep hot – The 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. This ensures you will not be woken up by changes in temperature.
  • Prefer medium-level contouring – These memory materials will not let you sink as deep as you might on other memory beds that can give you a classic deep hug feel. Instead, you should feel gently cradled and not as if you are trapped in the mattress.
  • Want sinkage options – Cocoon lets you choose between two comfort levels, which expands the versatility of the brand. If you prefer to sleep more inside your mattress, you would want to look at the Cocoon Soft™, but if you prefer to sleep more on the top, you might try their firmer version.

You might not like Cocoon Chill if you:

  • Prefer bounce – Though there is some bounce coming from the thick polyurethane base, which will support your weight and help you to navigate the surface of the bed, it will not have the same feel as a traditional innerspring mattress.

Construction (Materials & Quality)

Cocoon Chill is an all-foam bed-in-a-box option from Sealy, designed and assembled in North Carolina. You can use it with most solid foundations and supportive frames, including platforms, slats, and adjustable bases. The company sells its own foundations as well.

What separates the Chill from the Classic model is the proprietary phase-change materials incorporated into the durable stretch-knit cover that conduct and absorb heat away from your body when you are hot and release it back to you when your body starts to cool, maintaining a constant comfortable temperature.

The construction is made of three separate foams and measures 10 inches tall.

layers of cocoon chill by sealy

  • The first layer is 2 inches of the company’s Perfect Fit Memory Foam, which conforms to your body for comfort and pressure relief.
  • The second layer is a 2-inch Comfort Foam layer for added softness and contouring. Note this layer is absent in the firmer version and is replaced by an extra 2 inches of the base layer.
  • The third layer forms the base with resilient Essential Support Foam which will either be flexible for some extra give and 6 inches tall in the Cocoon Soft™ or reinforced for extra support and 8 inches tall in the Cocoon Firm™. In either version, this layer provides individuals with support and some bounce while giving the bed its shape and durability.

Firmness (Support & Feel)

We rated the Cocoon Soft™ version of the Chill as a 6 out of 10, with 10 being the firmest on our scale. Do not let the name fool you; this mattress is closer to the medium to medium-firm range. This tends to be the most popular level of firmness because it will accommodate many different sleep preferences.

The cover is soft and the stitching feels durable when stretched in multiple directions. It also feels exceptionally cool when you touch it, but after you lie down on it for a few hours, you will notice how the temperature regulation maintains an equilibrium.

With a top layer of slow-responding memory foam, an additional layer of comfort foam, and the flexible base underneath, you will feel yourself slowly settle into this bed for a gently cradled feeling. Because the layer of memory materials is supported by quicker-responding comfort foam and base underneath, you should not feel that deep hug that can sometimes make people feel stuck.

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. That said, if you are someone who physically struggles to get in and out of your mattress or prefer to sleep more on top of your mattress, the firmer model’s more reinforced and thicker base layer may be better geared to your preference.

Overall, the softer version of this mattress will accommodate most sleeping positions, which means combination sleepers who like to change things up should not have to sacrifice comfort or support as they alternate positions.

Cocoon Mattress Firmness

Most back sleepers will feel the cradling comfort layer especially in the curve of their lower back and the supportive base foam holding their spine in straight alignment.

Most side sleepers will feel the top foam layer conform to their curves and relieve the pressure of their weight that concentrates on hips and shoulders when they sleep in this position.

Exclusive stomach sleepers who are average weight or heavier will want to watch that their hips do not dip too low in the softer model. Most stomach sleepers, except for those who are significantly lighter, might be more comfortable on the Cocoon Firm™.

According to the company, this mattress was built to support weights up to 500 pounds per side, which is significantly more than most other all-foam brands claim to accommodate.

Everybody experiences firmness differently, and you should consider that a significantly heavier body will generally judge a mattress softer than someone who is significantly lighter, and that is something to keep that in mind when selecting a firmness level.

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. If you are trying to decide between firmness levels, know that the softer of the two beds will perform slightly better in this category.

Edge Support

Because memory foams tend to compress under your weight and body temperature, memory beds generally do not excel in this category, and this mattress performed as expected for an all-foam bed-in-a-box. 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.

While edge support is a preference-based feature, sleepers who need to maximize their mattress’ available surface area may find it important.

Other Considerations

  • Multiple Firmness Options – Depending on your preference, you may choose between two firmness levels.
  • Shipping – Free shipping and returns are available within the continental U.S.
  • CertiPUR-US® Certified – The foams in this mattress 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.
  • Adjustable Base Compatible
  • Designed and Assembled in the USA

Final Thoughts

9.1 Total Score

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.

Materials & Quality
Support & Comfort
Edge Support
Value for Money

Note: We did not include Trial/Warranty scores due Amazon Associates Program stipulations.

Sealy Mattress has over 100 years of expertise in the mattress industry, maintaining their longevity by offering consistent quality and durability, and Cocoon is their entry into the all-foam bed-in-a-box market.

Its medium-level contouring is designed for a broad appeal, as you should experience a nice cradling pressure relief without feeling like you cannot move around. If cradling is not your style and you prefer to sleep more on top of your mattress, you can choose a firmer option.

The addition of cutting-edge phase change technology to the Chill model should keep you from sleeping too hot and represents a blending of new innovation with time-tested tradition that you can try out for yourself.

Our team covers as many areas of expertise as we do time zones, but none of us started here as a so-called expert on sleep. What we do share is a willingness to ask questions (lots of them), seek experts, and dig deep into conventional wisdom to see if maybe there might be a better path towards healthy living. We apply what we learn not only to our company culture, but also how we deliver information to our over 12.7M readers.

Sleep research is changing all the time, and we are 100% dedicated to keeping up with breakthroughs and innovations. You live better if you sleep better. Whatever has brought you here, we wish you luck on your journey towards better rest.

Sleep Advisor