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Lauren Fountain is reader-supported. We may earn a commission through products purchased using links on this page. Learn more about our process here

Cocoon Chill

Mattress Type: Foam

Firmness: Medium Soft (4), Medium Firm (6)

$850 See Discount Price

Sealy is a major online and brick-and-mortar mattress brand that has been in business since 1881, and is today part of the Tempur Sealy International company. Sealy offers a wide selection of beds, but this review will focus on the Cocoon Chill, Sealy’s latest “bed-in-a-box” mattress model that can be ordered online and will ship directly to your doorstep.

The Cocoon Chill is a next-gen version of the Cocoon Classic. The newer model is constructed with a comfort layer of memory foam, followed by transitional and support layers of high-density polyfoam. This design provides a traditional memory foam feel characterized by close, even body-contouring and pressure relief. A standout feature of the Cocoon Chill is its polyester and cotton cover infused with phase-change material. Known as PCM for short, this material absorbs heat and dissipates heat from your body in order to maintain a comfortable sleep temperature, regardless of how warm you feel. Thanks to the PCM, the Cocoon Chill sleeps cooler than many competing all-foam mattresses.

You can choose between two feels for your Cocoon Chill. The medium soft to medium feel, which rates as a 4 on the 1-10 firmness scale, hugs the body closely and cushions the spine. This feel is optimal to people who weigh less than 130 pounds. The medium firm (6) feel provides stronger overall support and won’t sink as much beneath your body, making it better suited to people who weigh 130 pounds or more. Since the Cocoon Chill measures 10 inches thick altogether, it is considered a medium profile mattress.

Read on to learn more about the Cocoon by Sealy Chill memory foam mattress. We’ll include an overview of the bed’s construction and materials, dimensions and current prices for each size, performance ratings for the mattress in different sleep categories, and an overview of the company’s shipping, return, and warranty policies.

Cocoon Chill Mattress

Ideal for:

  • People who enjoy the deep body-contouring of a traditional memory foam mattress
  • Sleepers who frequently experience pressure or pain in the shoulders, lower back, and/or hips
  • Those who tend to overheat and feel uncomfortable on all-foam mattresses
  • Couples who awaken easily due to noise or movement in bed


  • The Cocoon Chill is available with medium soft and medium firm feels, but choosing one firmness over the other will not affect how much the mattress costs.
  • In addition to free ground shipping, which is available to all U.S. customers, Sealy offers UPS Next Day, UPS Two Day, and UPS Saturday shipping for an added charge.
  • The Cocoon Chill comes with a 100-night sleep trial that does not include a mandatory break-in period. If you aren’t satisfied with the mattress, you can return or exchange it at any point of the trial.
  • The mattress also comes with a 10-year warranty.
Cocoon by Sealy

Get 35% off a Cocoon Chill Mattress with code: SLEEPFOUND35

Cocoon Chill Video Review

Watch the video below to see how the Cocoon Chill Mattress performed when put to the test in the Sleep Foundation Lab.

Cocoon Chill Mattress Review Breakdown

The Cocoon Chill is an all-foam mattress constructed with a comfort layer of memory foam. This foam has a low density, which makes it more breathable than the higher-density foams found in some competing mattresses. At the same time, low-density foam is not as durable.

The medium soft Cocoon Chill also includes a transitional layer of high-density polyfoam. This layer is intended to provide extra cushioning for your body, keep you on an even plane, and prevent you from sinking too deeply into the mattress. The bed’s medium soft feel can be attributed to this extra foam layer. Lastly, the medium soft Cocoon Chill contains a support core of high-density polyfoam that stabilizes the entire mattress.

The medium firm Cocoon Chill has largely the same build, though its transitional layer is much sturdier than that of the medium soft version. As a result, this mattress offers a firmer, more supportive feel and won’t sink as much.

All versions of the Cocoon Chill include a polyester and cotton cover infused with phase-change material (PCM). PCM works by absorbing heat from your body and releasing it from the surface, which allows the mattress to remain cool regardless of your current weather or core temperature. While PCM can be highly effective for some sleepers, the foams in the Cocoon Chill may still retain and trap some heat.

Cocoon Chill Mattress Review Breakdown


Mattress Type

Medium soft (4), Medium Firm (6)



Both Cocoon by Sealy Chill models use PCM technology, along with a layer of memory foam over polyfoam on top of a polyfoam base.

Cover Material:

Cotton and polyester infused with PCM

Comfort Layer:

Memory foam

Transition Layer:


Support Core:

High-density polyfoam

Prices and Sizing

The Cocoon Chill’s price-point is on par with the average memory foam model, which typically costs between $900 and $1,200 in a queen size. The Cocoon Chill is more expensive than Sealy’s other bed-in-a-box model, the Cocoon Classic, which has a very similar build minus the cooling cover.

There are no add-ons for the Cocoon Chill that affect its overall cost. Standard ground shipping is free of charge for all U.S. orders, but expedited shipping will incur additional fees.

The Cocoon Chill is available in all six standard mattress sizes. As you can see from the table below, the mattress is exceptionally light, which should make it relatively easy to lift and move, though we still recommend asking someone to help you carry it from your doorstep.

Sizes Dimensions Height Weight Price
Twin 38" x 74.5" 12" 53 lbs. $999
Twin XL 38" x 79.5" 12" 56 lbs. $1,199
Full 53" x 74.5" 12" 70 lbs. $1,299
Queen 60" x 79.5" 12" 82 lbs. $1,499
King 76" x 79.5" 12" 106 lbs. $1,699
California King 72" x 83.5" 12" 105 lbs. $1,699
Scroll L - R for more details

Discounts and Deals

Cocoon by Sealy

Get 35% off a Cocoon Chill Mattress with code: SLEEPFOUND35

Mattress Performance

  • Motion Isolation

    When you get in and out of bed or shift sleep positions, these movements can produce motion transfer across the surface of the mattress. Responsive beds tend to produce more transfer, which can cause sleep disturbances for other people in bed.

    The Cocoon Chill, on the other hand, provides very good motion isolation regardless of which firmness you choose. The adaptive memory foam comfort layer absorbs movements from you and your sleep partner, nearly eliminating motion transfer in the process. We asked two testers to lie side by side on the mattress and feel for motion transfer from the other person. Both of them barely detected any movement from the other side of the bed.

    Additionally, the mattress does not produce any noise when bearing weight. We recommend the Cocoon Chill to anyone who wakes up easily due to noise or movement in bed.

  • Pressure Relief

    Memory foam mattresses are generally considered the best models for people who experience back pain and pressure points in different areas of the body. The Cocoon Chill is no exception. Thanks to its adaptive comfort layer and sturdy support foams, the mattress contours evenly to the body to improve your overall alignment. Even alignment is especially important for side sleepers, but the mattress also features a strong support system that makes it suitable for certain back and stomach sleepers with pressure points.

    That said, the firmness you choose can impact how well – or poorly – the Cocoon Chill alleviates pressure. Those who weigh less than 130 pounds will probably feel more comfortable on the medium soft model, which will conform quite closely. People who weigh 130 pounds or more may want to consider the medium firm feel instead, since these models are less likely to sink excessively.

  • Temperature Control

    The Cocoon Chill’s cover sets it apart from other all-foam mattresses. Infused with phase-change material, the cotton-polyester cover is designed to absorb and release heat from your body in order to maintain a cool temperature on the surface. Memory foam tends to retain more body heat than other comfort layer materials. Thanks to the Cocoon Chill’s specialty cover, the mattress delivers above-average temperature control.

    The foam density of the bed’s comfort layer also plays a role in temperature regulation. The memory foam has a lower density, meaning it won’t trap as much heat as the denser foams found in many competing mattresses.

    However, the mattress may still sleep warm for some people due to its all-foam composition. Choosing the right firmness is important here; excessive sinking can restrict airflow and compound how warm you feel in bed, whereas even support ensures better surface cooling.

  • Edge Support

    2/5 (Medium Soft), 3/5 (Medium Firm)
    When you sit on the edge of any mattress, you’ll probably notice more sinkage than when you are in the middle of the bed. How deeply the perimeter sinks depends on the materials that make up the individual layers – particularly layers in the support core.

    As is the case with many other all-foam beds, the Cocoon Chill tends to sink a bit along the edges. High-density foam, while sturdy in its own right, can’t withstand compression as well as steel coils, latex, and other support materials. You’ll notice more sinkage with the medium soft Cocoon Chill as opposed to the medium firm models, but all versions of the mattress are susceptible to deep perimeter sinkage that can worsen with time.

    A lack of edge support can make getting in and out of bed somewhat difficult, and you may feel less secure lying near the perimeter. This is particularly true for people who weigh more than 230 pounds.

  • Ease of Movement

    2/5 (Medium Soft), 3/5 (Medium Firm)
    On softer mattresses that tend to sink deeply, you may have a harder time moving across the surface and getting in and out of bed. Many people liken this feeling to being “trapped” by the mattress. Restricted movement can also create difficulty when changing sleep positions, and many couples find it negatively impacts sex.

    The medium soft Cocoon Chill will probably be somewhat difficult to move across if you weigh 130 pounds or more. With a medium firm feel, your movements are less restricted but people weighing more than 230 pounds may still experience some difficulty as the foam molds to their body.

    On the other hand, people who weigh less than 130 pounds should have an easier time moving across the Cocoon Chill. Even the medium soft feel shouldn’t sink too much beneath their weight.

  • Sex

    2/5 (Medium Soft), 3/5 (Medium Firm)
    Most couples find that the most comfortable mattresses for sex combine responsiveness and contouring. A bouncier surface makes it easy for you and your partner to move on the surface, while a conforming comfort layer ensures good traction when you want to maintain a single position.

    The Cocoon Chill certainly provides the latter. Since memory foam softens when exposed to body heat, the bed’s comfort layer will contour closely; this not only delivers good traction but can also heighten the sensation, according to some couples. Another benefit for romantic activities is the bed’s low noise potential, making it discreet if other people are sleeping in the next room.

    However, the mattress offers limited responsiveness due to its all-foam design. This means you and your partner may sink a bit when relocating to a different part of the mattress. The weaker edge support is another disadvantage. You may not be able to use the entire surface for sex and feel confined to the middle of the mattress.

  • Off-Gassing

    Foam emits a distinct chemical odor known as off-gassing, resulting in a “new mattress smell” for models with foam layers. Any all-foam mattress will produce at least some off-gassing, but certain models emit stronger and more persistent smells that you may find unpleasant.

    The Cocoon Chill releases some very noticeable off-gassing odor when new. This is due in part to its all-foam design, since the solid support core traps smells rather than flushing them out. The Cocoon Chill’s off-gassing odors will eventually dissipate, but this may take several days. To expedite the airing-out process, we recommend placing the mattress in a well-ventilated room for a few days before sleeping on it.

Sleeping Style and Body Weight

In addition to your personal firmness preferences, your experience with a mattress will often depend on your body type and normal sleep position(s).

After testing the Cocoon Chill, we found the mattress is well suited to side sleepers. The medium soft Cocoon Chill provides ample cushioning for the shoulders and hips to promote even spinal alignment. Side sleepers who weigh less than 130 pounds report excellent pressure relief on the medium soft model, and those weighing between 130 and 230 pounds also find this feel comfortable. Side sleepers who weigh more than 230 pounds may want to opt for the medium firm feel so they won’t sink as deeply, ensuring better alignment.

Back and stomach sleepers have different needs. These positions often require more support from their mattress to keep their bodies on an even plane. For back sleepers, the medium soft feel is best suited to those who weigh less than 130 pounds. Other back sleepers should find the medium firm model more supportive. Stomach sleepers across all weight groups generally prefer the medium firm feel instead. Those who use this position tend to sink more because people carry more weight in the torso and waist, so the medium soft feel will probably not provide enough support – especially for stomach sleepers who weigh at least 130 pounds.

Cocoon Chill – Medium Soft

Under 130 lbs. 130-230 lbs. Above 230 lbs.
Side Sleepers Excellent Good Fair
Back Sleepers Good Fair Fair
Stomach Sleepers Good Fair Poor
Scroll L - R for more details

Cocoon Chill – Medium Firm

Under 130 lbs. 130-230 lbs. Above 230 lbs.
Side Sleepers Fair Good Good
Back Sleepers Good Excellent Good
Stomach Sleepers Good Good Good
Scroll L – R for more details
Cocoon by Sealy

Get 35% off a Cocoon Chill Mattress with code: SLEEPFOUND35

Trial, Warranty, and Shipping Policies

  • Availability

    The Cocoon Chill is available for purchase on the Cocoon by Sealy website, as well as Amazon. Other Sealy mattresses are also widely sold in brick-and-mortar retail stores, but the Cocoon Chill can only be ordered online.

  • Shipping

    Sealy offers free standard ground shipping for all U.S. orders of the Cocoon Chill. Most customers receive their mattress within five to seven business days of placing their original order.

    Since it is a “bed-in-a-box” model, the Cocoon Chill will be compressed and vacuum-sealed in plastic. This process – known as “roll-packing” – ensures the mattress will fit inside a standard ground shipping box, which will be delivered to your doorstep. You won’t need to be at home or sign for the package when it arrives.

    To set up the mattress, first carry it to the room of your choice. As light as the Cocoon Chill is, we recommend enlisting in a lifting partner because the box is still somewhat heavy. Open the box and carefully remove the plastic. The mattress will immediately begin to expand, but full shape recovery may take up to 48 hours.

  • Additional Services

    In addition to standard shipping, you can also opt for UPS Next Day, UPS Two Day, or UPS Saturday Delivery for an added surcharge, which will be calculated during checkout. However, full-service White Glove delivery is not available.

  • Sleep Trial

    Sealy offers a 100-night sleep trial for the Cocoon Chill. This trial does not include a mandatory break-in period, so you can return the mattress at any point during the 100 nights. You can also exchange your mattress for a Chill model with a different firmness level, or for the Cocoon Classic. Once the return has been confirmed, most customers receive their refund within two business days.

  • Warranty

    The Cocoon Chill is backed by a 10-year warranty. The warranty is non-prorated, meaning Sealy will cover all repair or replacement costs if the mattress develops a defect within the first 10 years. However, you’ll need to cover round-trip transportation costs associated with repairs or replacements.

    Under this warranty, sagging or body impressions in the surface of the mattress that measure at least 1 inch deep are considered defects. The same goes for physical flaws that cause the foams to deteriorate prematurely despite proper handling and use. Other issues, such as normal wear and tear or damage from misuse or improper foundational support, are not covered under the warranty.

    Under this warranty, sagging and body impressions in the surface measuring 2 inches or deeper are considered defects. Other issues, such as physical damage from misuse or improper foundational support, are not considered defects and will not warrant repairs or replacements.