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Attention, hot sleepers: The Cocoon by Sealy Chill Mattress might be just what you’ve been looking for.

This cooling mattress comes in both a memory foam and hybrid option, sure to please just about any sleeping style.

Let’s take a closer look at the mattress and what you might want to consider before buying.


  • Offered as a memory foam or hybrid mattress
  • Made with cooling technology and CertiPUR-US certified foam
  • Decompresses quickly once unboxed
  • Comes with a 100-night sleep trial and a 10-year limited warranty
  • Ships free
  • Designed and built in the United States
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  • Off-gasses a slight plastic smell the first 1 to 2 nights, according to customer reviews
  • Delivery doesn’t include white-glove service or removal of your old mattress
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When compared to other boxed mattresses, the Cocoon by Sealy Chill Mattress is moderately priced.

There are slightly cheaper mattresses on the market, but there are also far more expensive ones, especially when looking at hybrids.

Chill Memory Foam MattressChill Hybrid Mattress
twin XL$770$1,199
California king$1,310$1,699

Chill Memory Foam Mattress

  • Firmness: Medium firm
  • Height: 10 inches

While memory foam mattresses typically trap heat, this one offers all the benefits of a memory foam mattress without that sweaty feeling.

Thanks to the all-foam construction, it has little motion transfer, making it a good choice for light sleepers. It might also work well for people seeking pressure relief, as well as side and stomach sleepers.

The mattress has four layers. The base is a heavier, more durable foam that provides support.

On top is a layer of comfort foam, which is designed to prevent the “sinking in” feeling that accompanies some memory foam mattresses.

The third layer is adaptive and is intended to conform to your body as you sleep.

The last layer is a cooling cover made of a “phase change material.” Sealy doesn’t go into too much detail about how the fabric works, but they say it absorbs body heat to keep you cool. Reviewers support this notion, citing how cool the mattress feels even after many nights of sleep.

All the foam used in the mattress are CertiPUR-US certified. Customers can add pillows, sheets, or a powered base to their purchase.

Buy the Cocoon by Sealy Chill Memory Foam Mattress online.

Chill Hybrid Mattress

  • Firmness: Medium firm
  • Height: 12 inches

Hybrid mattresses are for sleepers who want the best of both worlds: memory foam comfort and pocketed coil support.

Much like the memory foam version, the hybrid is made of four layers.

There’s a supportive base, followed by an active support coil layer. The coils are meant to aid in the cooling factor, as they’re supposed to allow for airflow.

The coils are covered in a layer of CertiPUR-US certified memory foam that claims to adjust and adapt to any body size or sleeping position.

Reviews, however, seem to indicate the hybrid mattress is best for back and stomach sleepers. Side sleepers say the mattress is a bit too firm for them.

Finally, the mattress is topped with the same phase change material layer as the memory foam version. This material is supposed to absorb and dissipate heat, so you can keep cool all night.

Finally, if you’re worried about the edges of the bed sinking, or if you tend to sit on the edge of the bed, the hybrid mattress might be a good choice for you. It boasts a steel perimeter to provide good edge support.

Buy the Cocoon by Sealy Chill Hybrid Mattress online.

Both versions of the Cocoon Chill Mattress are currently only sold on Sealy’s website.

You won’t find them through third-party retailers or in stores.

If you’re looking for a medium-firm mattress that claims to keep you cool all night long, you may want to consider a Cocoon Chill Mattress.

That said, whether you opt for the memory foam or hybrid option depends on how you sleep.

If you sleep with a partner, are a light sleeper, or sleep on your side, memory foam mattresses are usually the best bet.

If you have a higher body weight, want more support, or tend to change positions throughout the night, the hybrid version may be a better choice.

Sealy has an A+ Better Business Bureau (BBB) rating. Although their BBB profile shows some complaints, Sealy has been in business for over 130 years.

Most of the complaints on the BBB seem to be related to customer service issues and refund delays rather than problems with the mattresses themselves.

The majority of reviews on Sealy’s website relate to the mattresses themselves. Overall, both the hybrid and memory foam mattresses are rated highly. Reviewers say they’re comfortable and cool.

Most of the low ratings are due to the mattress not being right for a particular sleeper, rather than an issue with Sealy as a company or the customer service.

No matter which version you buy, the Cocoon Chill Mattress comes compressed and vacuum sealed in a large box.

Customers say it’s quite easy to maneuver the mattress out of the box and into place. It takes about an hour to completely unfurl.

Some reviewers say there was a plastic smell the first 1 to 2 nights of using the mattress. This is common in mattresses that include memory foam.

However, reviewers say that, after sleeping on the mattress a few times and airing it out, there was no lingering chemical or plastic odor.

If you’re unhappy with your mattress for any reason, Sealy will provide a total refund within 100 nights of use.

All you have to do is submit a refund request, and they’ll arrange for a pickup. Sealy donates refunded mattresses to local charities.

The Sealy Cocoon Chill Mattress is designed for hot sleepers. The option of either memory foam or hybrid means that many sleepers may find an option that works for them.

Consider your sleeping style and preferences when deciding between the two options. Light sleepers seem to prefer the memory foam, while those who need more support and those who want a more classic mattress feel tend to opt for the hybrid.

Alexandra Shimalla grew up writing princess stories on her family’s laptop in their makeshift laundry room/office. She’s now a freelance journalist based in Georgia. She holds a master’s degree in journalism and enjoys writing about health and wellness, gluten-free living, and higher education. Her writing has appeared in print and digital publications, such as Paste and Georgia Magazine. If she’s not at her computer, then she’s at the gym. Learn more about Alexandra by visiting her website (www.alexshimalla.com).