Cocoon Chill Mattress Review | Sleepopolis


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The Cocoon Chill is made by veteran mattress industry titan, Sealy. The bed is aptly named, since you’ll feel enveloped in cooling comfort. It’s a memory foam mattress made with plenty of cooling technology, like its Phase Change Material mattress cover that actively works to dissipate body heat (more on that later). But is the right mattress for your sleep needs?

In this review, I’m going to share my personal experience testing the Cocoon Chill, how it performed on our Sleepopolis tests, which sleepers I think it’s best for, and Sealy’s policies for this bed. I’ll also answer some FAQs towards the end of the review.

Short on time? Head on down to my review summary and come back later for the good stuff.

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Sealy Cocoon Chill

The Cocoon Chill is Sealy’s ultra-cooling all-foam mattress that offers a memory foam comfort layer to provide a contouring feeling as you sink in for pressure relief.

Is the Cocoon Chill a Good Mattress for You? 

Before I dive into all the details about the Cocoon Chill, I’d like to give a few quick recommendations on which sleepers I think it’s best for. Depending on factors like your body weight, preferred sleeping position, and whether or not you sleep with a partner, this mattress may or may not work for you. 

Who I recommend Cocoon Chill mattress for

  • Hot sleepers! This bed does live up to its name — it sleeps super cool. If you’re worried about overheating you’ll be happy with this mattress.
  • I think this bed has a great feel for back sleepers. These sleepers will feel well supported on this bed, which is just a bit firmer than the industry standard for medium-firm. I’d also say it’s a great bed for back sleepers with back pain, since that added firmness helps promote a neutral spine alignment.
  • I think couples could enjoy this mattress. It has very good motion isolation, which means you’re unlikely to feel your partner tossing and turning at night. Its cooling capabilities are also great for two sleepers (who sleep hotter than one).

cocoon chill back sleeperI think the Cocoon Chill is great for back sleepers.

Who I don’t recommend Cocoon Chill mattress for

  • I don’t think this mattress is quite right for combination sleepers. You’ll feel more “in” this bed than “on top” of it, which can make switching positions more difficult.
  • Strict side sleepers will likely want a softer mattress. I’d recommend they check out our best mattress for side sleepers roundup, which has plenty of beds that offer the pressure relief these sleepers need.

How Firm is the Cocoon Chill Mattress?

Before we get started, I’d like to mention that firmness is subjective, and how firm a mattress feels will depend on factors like your body weight and preferred sleeping position. To get the best idea of firmness possible, I combined my own expert opinion on this bed’s firmness with that of my colleagues, and together we came up with an average firmness score.

cocoon chill firmnessThe Cocoon Chill is on the firmer side.

We decided to give this bed a 7 out of 10 on the firmness scale, which is just a bit firmer than the industry standard for medium firmness, which is 6.5. This means that this is a solidly firm mattress. 

You’re going to feel more “in” this bed than “on top” of it. Its thick top layer of memory foam gives it some sinkage, so if you’re looking for a bouncy bed, you’re in the wrong place. However, if you like to feel hugged by your mattress, this could be a great bed for you!

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Sealy Cocoon Chill

Sealy Cocoon Chill

The Cocoon Chill is Sealy’s ultra-cooling all-foam mattress that offers a memory foam comfort layer to provide a contouring feeling as you sink in for pressure relief.

Cocoon Chill Mattress Performance 

We’ve used a few tools to measure how the Cocoon Chill performs in real life scenarios, like dealing with a restless partner, sleeping with different types of pain, and trying to sleep on the very edge of the bed. I’ll share some of those results below, but first I’m going to discuss how this bed works for sleepers of differing body weights.

Testing the Cocoon Chill Mattress in Different Sleeping Positions

Depending on your body type and preferred sleep position, you’re going to experience a mattress uniquely. 

Is the Cocoon Chill a Good Mattress for Light Sleepers (Under 130 lb)?

  • Light Back Sleepers – These sleepers should feel nice and supported on this bed. I’d especially recommend it to lightweight back sleepers who prefer a firmer feel.
  • Light Side Sleepers – This mattress isn’t going to be soft enough for these sleepers. They won’t experience the level of sinkage they need at their hips and shoulders.
  • Light Stomach Sleepers – I’d recommend this mattress to lightweight stomach sleepers. They’ll get the level of support they need to promote a neutral spine alignment. 

Is the Cocoon Chill a Good Mattress for Average Weight Sleepers (130 – 250 lb)? 

  • Average Weight Back Sleepers – These sleepers will do quite well on this mattress. It’ll offer the firm support they need to keep their spines in a nice straight line.
  • Average Weight Side Sleepers – Again, side sleepers aren’t going to be happy here. This mattress is too firm for their needs.
  • Average Weight Stomach Sleepers – I’d say this mattress is a touch too soft for average weight stomach sleepers, especially those on the heavier side of average. I’d steer these sleepers to a firmer innerspring mattress instead.

Is the Cocoon Chill a Good Mattress for Heavy Sleepers (over 250 lb)? 

  • Heavy Back Sleepers – I don’t think this bed has the level of support that heavy people need. I typically steer these sleepers to a mattress designed for their needs, like one of our best mattresses for heavy people.
  • Heavy Side Sleepers – See above.
  • Heavy Stomach Sleepers – See above.

Cocoon Chill Mattress Pain Relief Performance

A mattress that helps alleviate pain is one that’s going to relieve pressure at sensitive pain-prone pressure points at the hips, shoulders, and lower back. Depending on the type of pain you have, you’ll want to choose a specific mattress to combat it.

To measure how well a mattress relieves pressure, I used a handy pressure mat. The map goes between me and the mattress and measures how much pressure my body exerts on the bed. It then creates a “map” of my body, turning blue for the lowest pressure, and grading up to green, yellow, and lastly red for the highest pressure. 

cocoon chill pressurePressure map results for the Cocoon Chill.

Back Pain – I think the Cocoon Chill is a great mattress for back pain. As you can see in the maps above, in each position my back is all blue, indicating low pressure.

Shoulder Pain – Though the map is blue at my shoulders as well, I am a lighter weight sleeper who exerts less pressure on the mattress. I’d say most sleepers with shoulder pain should opt for a softer bed.

Hip Pain – As you can see above, there’s an indication of a bit of pressure at my hips on both my side and stomach. If you suffer from hip pain it’s imperative that you choose a soft mattress that’s going to cushion that sensitive area.

Cocoon Chill Mattress Performance for Couples

If you sleep with a partner, you’ll want to keep a few extra things in mind. You’ll want to be sure that your mattress absorbs your partner’s movement, is good for sex, has strong edges, and sleeps cool. 

Motion Transfer 

Motion transfer is the movement detectable from one side of the bed to the other. It’s important for couples to keep in mind, especially those who are easily disturbed. 

To measure motion transfer, I dropped a 10 lb steel ball from varying heights on one side of the bed and measured the results with a seismometer on the other side of the bed. Each drop is meant to symbolize a different movement you’re likely to experience in bed, from tossing and turning (4 inches) to getting out of bed (8 inches) all the way to full on jumping (12 inches). 

cocoon chill motionThe Cocoon Chill has pretty low motion transfer.

These are good motion transfer results! This shows that you’re unlikely to feel your partner’s movements on your side of the bed. If you’re a light sleeper and sleep with a partner, the Cocoon Chill could be a great bed for you.


The best mattress for sex is going to be one that has a bit of lift, bounce, and responsiveness to make moving around easier. The Cocoon Chill doesn’t have these features. You’ll definitely feel more “in” this bed than “on top” of it, which can make moving around during sex more difficult.


Two people overheat more easily than one, so it’s important for couples to have a cooling mattress. Luckily, the Cocoon Chill sleeps super cool, so you and your partner don’t have to worry about overheating. I’ll talk about some of its cooling materials in the construction section below.

Edge Support

Edge support tests whether the edges of the bed are sturdy enough to support you when you roll toward them or sleep on the edge. This is important for couples because they want to be able to use their entire mattress. 

The Cocoon Chill has decent edge support. It’s not the best I’ve seen, but you shouldn’t feel like you’re going to fall off the edges when lying there.

What is the Cocoon Chill Mattress Made Of? 

The Cocoon Chill is an all-foam mattress made with three layers of pressure-relieving foam. It has a height of 10 inches.

cocoon chill mattressThe Cocoon Chill in the Sleepopolis studio.

Cover – This mattress has a cooling cover made from a stretch-knit fabric that is woven with Phase Change Material, which actively works to dissipate body heat. Phase Change Material is a high-tech fabric that can actually absorb body heat, which is what gives this bed its super cool feel.

Comfort Layer – The top layer of this foam bed is made from Perfect Fit Memory Foam. This offers lots of contouring and some gentle pressure relief. 

Transition Layer – Next up is a layer of Responsive Comfort Foam. This layer helps reduce motion transfer and prevents you from sinking too far into the mattress.

Base Layer – The base layer, or support layer, of this bed is made from high-density poly foam. This adds some nice firmness, stability, and durability to the bed.

Cocoon Chill ConstructionTaking a look inside the Cocoon Chill.

Cocoon Chill Mattress Unboxing and Off-Gassing

The Cocoon Chill is a bed-in-a-box mattress, which means it ships compressed in a box. You’ll need to wait at least 24 hours after unboxing before you use this bed. This will give the mattress time to fully decompress and release any trapped gas.

My Final Thoughts about Cocoon Chill Mattress

And with that, we’ve made it to the end of my review! Though I can’t tell you if the Cocoon Chill is the right new mattress for you, I’ll leave you with a few of my final thoughts.

My favorite things about Cocoon Chill mattress

My favorite thing about this mattress is how cooling it is. In the mattress world, we refer to a Phase Change Material cover as the gold standard for cooling covers. I also think this is a great bed for back sleepers, especially those who suffer from back pain, since its firmness level helps promote a straight spine alignment. 

My Cocoon Chill mattress complaints 

This bed has a classic memory foam feel, meaning you’ll feel much more “in” than “on top” of the bed, which can be a drawback for some, especially those who like to switch positions throughout the night. I’d also say this bed isn’t quite soft enough for side sleepers

Another thing to look out for is Sealy’s customer service. A few customers have reported inconsistent communication with their team, which is something to look out for.

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Sealy Cocoon Chill

Sealy Cocoon Chill

The Cocoon Chill is Sealy’s ultra-cooling all-foam mattress that offers a memory foam comfort layer to provide a contouring feeling as you sink in for pressure relief.

How Much Does the Cocoon Chill Cost? 

Price is always an important factor that goes into buying a new mattress. Take a look at our pricing chart below, and be sure to use our coupons to save on this mattress.

Price listed will be before discount or offer for each size. 

Size Dimensions Price
Twin 74.5″ x 38″ x 10″ $730
Twin XL 79.5″ x 38″ x 10″ $770
Full 74.5″ x 53″ x 10″ $850
Queen 79.5″ x 60″ x 10″ $1,080
King 79.5″ x 76″ x 10″ $1,310
Cal King 83.5″ x 72″ x 10″ $1,310

Sealy Mattress Policies and FAQs

Does Sealy offer a mattress warranty?

Yes, the Cocoon Chill comes with a 10-year warranty.

Does Sealy offer a trial period?

Yes, the Cocoon Chill comes with a 100-night sleep trial. 

How does the Cocoon Chill ship?

The Cocoon Chill ships for free throughout the USA.

What is Sealy’s return policy?

Sealy offers free returns and full refunds for mattresses returned before the end of the trial period.

Cocoon Chill Mattress Vs  

It can be helpful to see how a mattress stacks up to some of its competitors. Take a look at how the Cocoon Chill compares to the Casper Original and Nectar Original mattresses.

Cocoon Chill vs Casper

  • The Cocoon Chill and Original Casper are both all-foam mattresses with similar firmness levels
  • The Cocoon Chill sleeps a bit cooler than the Casper thanks to its cooling cover.
  • The Cocoon Chill comes at a slightly lower price point than the Casper.
  • Check out my full Casper mattress review.

Cocoon Chill vs Nectar

  • Both these mattresses have memory foam layers and offer some nice sinkage and pressure relief.
  • These beds have similar firmness levels. 
  • The Cocoon Chill is a bit cheaper than the Nectar.
  • Read my full Nectar mattress review.

Other Models from Sealy

Wondering what else Sealy has to offer? Take a look at how the Cocoon Chill stacks up to a couple of their other popular models. 

Cocoon Chill vs Cocoon Chill Hybrid

  • The Cocoon Chill Hybrid mattress is similar to the Cocoon Chill, but it has a layer of coils.
  • The Hybrid has a bouncier and more responsive feel than the all-foam Cocoon Chill.
  • Both mattresses sleep super cool thanks to their cooling Phase Change Material covers.
  • Check out my full Cocoon Chill Hybrid mattress review.

Cocoon Chill vs PosturePedic Hybrid Paterson

  • The PosturePedic mattress was designed with orthopedic specialists to be especially good for back pain.
  • The PosturePedic has a more “on top” of the bed feel and is more responsive than the Cocoon Chill.
  • The PosturePedic and Cocoon Chill come at similar price points.
  • Learn more in my full Sealy PosturePedic mattress review.

Take a look at our mattress performance ratings for the Cocoon Chill mattress below.

  • Materials
  • Comfort
  • Support
  • Value
  • Cooling
  • Edge Support
  • Trial
  • Warranty

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AvatarI’m Zoë, the Editor here at Sleepopolis. I write and edit mattress reviews, and star in mattress review videos. I like to take an honest approach to my reviews to tell you whether or not a product will fit your specific needs. Personally, I’m a side sleeper. I prefer a softer hybrid mattress that lets me sink in. If you have any specific questions feel free to reach out to me at [email protected]

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