Save 35% on a Cocoon Chill Mattress and get free pillows and sheets with this code: SLEEPFOUND35
Sleepfoundation.org is reader-supported. We may earn a commission through products purchased using links on this page. Learn more about our process here
Watch the video below to see how the Cocoon Chill Mattress performed when put to the test in the Sleep Foundation Lab.
The Cocoon Chill Mattress is an all-foam model that rates as a 6 out of 10 on the firmness scale, making it medium firm. This feel makes it well suited to a variety of body types and sleep positions. The mattress has three foam layers that are each designed with different purposes for a balanced performance with both support and contouring. It also includes an innovative cover that’s engineered to sleep cool. The Cocoon Chill measures 10 inches tall, so it shouldn’t require deep pocket sheets.
A high-density polyfoam support core is stable, supportive, and engineered for durability. The polyfoam transitional layer sits on top of the support core. It is fairly firm to help prevent sleepers from sinking in against the firmer support layer. Since it is responsive and bounces quickly back to its original shape, this layer also improves the overall ease of movement.
The memory foam comfort layer conforms closely to the body to provide contouring and pressure point relief. As a fairly low-density memory foam, it tends to retain less heat. However, low-density foam is also typically less durable.
One of the Cocoon Chill’s most notable features is its knit cover, which is infused with phase change material designed to regulate body temperature. This material is engineered to absorb and dissipate excess body heat to keep your mattress surface cool throughout the night. Combined with the low-density memory foam layer, the Cocoon Chill sleeps cool when compared to other memory foam mattresses.
The Cocoon Chill has three foam layers, including a layer of memory foam and two layers of polyfoam. The cover is a stretch knit that’s infused with phase change material designed to better regulate body temperature.
Phase Change Material
Memory Foam, Polyfoam
The Cocoon Chill’s price-point is around average compared to other all-foam mattresses, which typically run $900 to $1,200 for a queen. Sealy also offers the Cocoon Chill in a hybrid version, which is more expensive than the all-foam model but costs less than average for a similarly constructed mattress. Considering the materials and cooling technologies included in the bed, the all-foam Cocoon Chill may be a good option for value seekers.
The mattress is available for purchase in the six standard sizes: twin, twin XL, full, queen, king, and California king. Sealy offers optional sheet and pillow bundles that are designed to complement the mattress. You can also add-on a compatible bed base or foundation.
|Twin||38" x 75"||10"||40 lbs.||$469|
|Twin XL||38" x 80"||10"||42 lbs.||$499|
|Full||53" x 75"||10"||56 lbs.||$549|
|Queen||60" x 80"||13"||64 lbs.||$699|
|King||76" x 80"||13"||83 lbs.||$849|
|California King||72" x 84"||10"||83 lbs.||$849|
Side sleepers typically have the most significant pressure points of all the sleeper types. When you lay on your side, the majority of your weight rests on your hips and shoulders, which can create uncomfortable pressure buildup.
Side sleepers generally prefer a mattress with a mix of contouring relief and stable support. The Cocoon Chill does both these things well. Its memory foam comfort layer molds to a side sleeper’s body and spreads out its weight to ease pressure points, while the supportive polyfoam transition layer and core limit sinkage.
Because of its medium firm feel, the Cocoon Chill may be best suited for side sleepers who weigh over 130 pounds. Side sleepers who weigh under 130 pounds may notice more pressure accumulation around their hips and shoulders since they won’t sink in as deeply.
Back sleepers generally prefer to feel as if they’re “sleeping on” a mattress instead of “sleeping in” one. Sinking too far into a mattress can cause discomfort for a back sleeper, especially since their hips could dip more deeply into the mattress than the rest of their body and put pressure on their lower back. The best mattress for back sleepers is often one that gently cradles the hips while providing enough support to align the spine.
Thanks to the Cocoon Chill’s memory foam comfort layer, a back sleeper’s hips should be able to sink in just a bit. Support from the polyfoam transition layer and core help promote healthy sleep posture.
The Cocoon Chill performed well for back sleepers of all weights, especially those between 130 and 230 pounds. Back sleepers under 130 pounds may not enjoy as much cradling as they’d like, while those who weigh over 230 pounds could experience some sinkage around their hips.
Stomach sleepers need extra support in order to maintain spinal alignment and stay comfortable. A mattress that’s too soft can allow a stomach sleeper’s midsection to sink into the support core, which can put a strain on their lower back. A mattress on the firmer side prevents this by providing even support.
Stomach sleepers across all weight groups found the Cocoon Chill supportive enough to maintain a comfortable position throughout the night. The polyfoam transition layer and support core keep the mattress true to its medium firm rating and help prevent the sleeper’s midsection from sinking in too deeply, while the memory foam comfort layer adds some softness to the surface.
|Under 130 lbs.||130-230 lbs.||Above 230 lbs.|
Though Sealy does offer some models through brick-and-mortar retail partner locations, the Cocoon Chill can only be purchased online through the Cocoon by Sealy website.
The Cocoon Chill ships for free within the contiguous United States via UPS Ground. On weekdays, Sealy processes orders within 48 hours and ships the mattress directly to the customer’s home. Most shoppers receive their mattresses within 5 to 7 days. The mattress arrives compressed, rolled, vacuum-sealed in plastic, and packaged in a box. The customer will need to bring it into their home, place it in their room of choice, and set it up. Unpacking instructions are included.
Sealy does not offer standard White Glove delivery or old mattress removal with your mattress purchase. However, customers who also buy an Ease Power Base in addition to the Cocoon Chill Mattress qualify for free White Glove delivery and old mattress removal. Expedited and weekend shipping are also available for an additional fee.
Your mattress purchase includes a 100-night sleep trial. Sealy recommends sleeping on your mattress for a minimum of 30 nights to adjust.
Sleepers who choose to return their Cocoon Chill must coordinate a return with Sealy. The company will arrange to haul away your mattress, donate it to a local charity, and issue a full refund of the purchase price once the return is confirmed. This policy is limited to one return per customer.
The Cocoon Chill is backed by a nontransferable 10-year limited warranty. The warranty covers manufacturer defects that arise with normal use on a proper foundation. Eligible defects include indentations more than 1-inch deep and physical flaws, like tearing of the mattress cover. In the event that Sealy confirms a covered defect, the company will elect to either repair or replace the mattress. Additional terms and conditions apply.
The Sleep Foundation editorial team is dedicated to providing content that meets the highest standards for accuracy and objectivity. Our editors and medical experts rigorously evaluate every article and guide to ensure the information is factual, up-to-date, and free of bias.
The Sleep Foundation fact-checking guidelines are as follows: