Close up of the Cocoon mattress on a wooden bed frame

Cocoon vs Casper Mattress Comparison

The Cocoon and Casper mattresses are similar on paper, but does that translate into real-life performance? That’s what we’ll reveal in this comparison.

Cocoon and Casper are both trusted bed-in-a-box mattress brands with popular memory foam mattresses. If you’re looking for a new mattress, the Cocoon Chill and Casper are affordable options with excellent performance and functionality scores. 

So how do you choose? That’s the topic of this comparison. The Cocoon Chill and Casper mattresses have some key differences that will likely help you take the plunge on one or the other. Specifically, we’ll talk about our review scores, pricing, construction, and performance.

Cocoon vs Casper Breakdown

Customer Rating
MA Score
Trial Period


Customer Rating
MA Score
8.7 / 10

Cooling memory foam mattress by Sealy


Medium-firm: 6/10


Memory foam

Trial Period

100 days


10-year limited warranty


Customer Rating
MA Score
9.1 / 10

Universal firmness mattress for the average sleeper


Medium-firm: 6/10


Memory foam

Trial Period

100 days


10-year limited warranty

Key Similarities

  • All-Foam Mattresses: Both of these beds are constructed from memory foam and polyfoam.
  • Warranty: The Cocoon Chill and Casper mattresses are each covered by an industry standard 10 year warranty.
  • Trial Period: With either mattress, you get a 100 day sleep trial to get the feel of the mattress in the comfort of your home.
  • Firmness Levels: The Casper and Cocoon Chill mattresses have a medium-firm feel, which is around 6/10 on the firmness scale.

Key Differences

  • Pricing: For all but the full and queen sizes, the Cocoon Chill will cost you up to $135 more. The biggest difference in cost is for the smaller mattress sizes.
  • Support Features: The Cocoon Chill has a “Perfect Fit” comfort layer that adapts to your body type. The Casper features a zoned support layer with three targeted ergonomic regions.
  • Cooling Technology: Casper keeps you cool with breathable open-cell foam, while the Cocoon Chill has a cool-to-touch cover.
  • Thickness: The Casper mattress is 11” thick, while the Cocoon Chill is 10” thick. This won’t make a big difference to the average sleeper, but it’s important when you’re buying sheets or measuring your sleep space.

Cocoon Chill Mattress Review Highlights

  • The Cocoon Chill is Sealy’s bed-in-a-box mattress model. We chose it as one of our best cooling mattresses for hot sleepers
  • The Cocoon Chill earned top marks for motion isolation, making it a great choice for couples who are concerned about motion disturbances during the night.
  • Hot sleepers will love the phase change material in the mattress cover. The cover responds to your body temperature by either absorbing or releasing body heat, so you stay temperature neutral throughout the night.
  • Take a look at our Cocoon Chill Hybrid mattress review for a look at the company’s different mattresses.

Casper Mattress Review Highlights

  • We consider the Casper mattress to be one of the best mattresses for side sleepers, thanks to its strong performance during our pressure relief and spinal alignment tests.
  • The Casper earned a perfect 10/10 score during our responsiveness test. In other words, you won’t need to wait for the foam to adapt to your changes in position.
  • The zoned support layer provides firmer or softer support right where you need it. The result is more even weight distribution and better contouring around your pressure points.
  • If you’re interested in a high-quality Casper at a lower price point, read our Casper Element mattress review. Fans of innerspring should check out the Casper Hybrid mattress review or the Casper Nova Hybrid mattress review.  

Casper Mattresses Offer a Bit More Surface Area

Take a look at how the Cocoon Chill and Casper mattresses differ by dimension. The Casper is slightly thicker, and the Cocoon Chill has extra precise sizing.

Cocoon Chill Casper
Thickness 10″ 11″
Twin 38″ x 74.5” 38″ x 75″
Twin XL 38″ x 79.5” 38″ x 80″ 
Full 53″ x 74.5” 53″ x 75″
Queen 60″ x 79.5” 60″ x 80″ 
King 76″ x 79.5” 76″ x 80″ 
California King 72″ x 83.5” 72″ x 84″ 

Learn more about mattress sizes.

Casper Tends To Be More Affordable

You can see how the Cocoon Chill and Casper mattresses are priced below. Generally, the Casper is lower cost, except for the full and queen sizes, which range from $15–$145 more than the Cocoon Chill.

Cocoon Chill Casper
Twin $730 $595
Twin XL $770 $695
Full $850 $995
Queen $1,080 $1,095
King $1,310 $1,295
California King $1,310 $1,295


Compare the Memory Foam Constructions

Ever wish you could cut a mattress in half to see the layers? There’s no need—we’ll show you how each of these mattresses looks on the inside.

Inside the Cocoon Chill Mattress

The Cocoon Chill is constructed with three foam layers. All of the foams are made in the USA and CertiPUR-US certified for non-toxic materials and low emissions.

  • Mattress Cover: A soft, breathable stretch-knit fabric encases the entire mattress. It’s infused with phase change materials that absorb excess heat. 
  • Top Layer: A layer of Perfect Fit memory foam conforms to your body and sleeping position.
  • Transition Layer: A layer of polyfoam suspends your body, so you don’t sink too deep into the mattress.
  • Support Layer: A foundational layer of support foam improves mattress durability.
Inside Casper Original

Inside the Casper Mattress

The Casper mattress is made of three layers of foam that are CertiPUR-US certified and intentionally designed to provide breathability and pressure relief.

  • Mattress Cover: A soft, breathable fabric cover wraps around the entire mattress.
  • Top Layer: Airscape open-cell foam increases airflow and helps to move hot air away from the mattress.
  • Support Layer: A memory foam comfort layer with three ergonomic zones provides more cushion under your shoulders and more support under your hips, waist, and lower back.
  • Base Layer: A bottom layer of durable support foam prevents sinkage and supports your body weight.

Score Breakdowns

We put both of these mattresses under the magnifying glass during our in-depth review process. You’ll notice that the Cocoon Chill and Casper scored pretty similarly, but marginal differences can make a noticeable difference.

Cocoon Chill Casper
Shipping 8 10
Trial Period 9 9
Return Policy 10 10
Warranty 9 9
Set-Up Test 8 8
Motion Transfer Test 9 8
Edge Support Test 9 9.5
Pressure Relief Test 8.5 8.5
Spinal Alignment Test 9 9.5
Responsiveness Test 9 10
Cooling Evaluation 7.5 7
Durability Evaluation 8 8
Customer Service Score 9 9
Social Impact Score 4 9
TOTAL SCORE 8.7/10 9.1/10


Motion Transfer

Have you been woken from a deep sleep by a partner who gets out of bed in the wee morning hours? Then pay special attention to motion transfer. During our review process, we measure how well a mattress isolates motion on the mattress surface. 

The Cocoon Chill and Casper each earned above-average scores, but the Cocoon Chill scored a whole point higher. If you’re an especially light sleeper, the Cocoon Chill will do a better job of minimizing sleep disturbances from sleeping partners, pets, or children.

Pressure Relief

No matter which sleeping position you favor, you need pressure point relief. Side sleepers need the most pressure relief for a good night sleep, since they put a lot of weight on their shoulders and hips. Stomach sleepers also need to cushion their ribs and hips. Even back sleepers need a touch of softness between them and the base layers of an extra firm mattress.

The Cocoon Chill and Casper mattresses both received an 8.5/10 for pressure relief. In this case, you’ll need to defer to other categories to make your decision. For example, side and stomach sleepers will want maximum spine alignment, while combo sleepers need a responsive bed.


You would think that this would be a decisive category in our Cocoon Chill versus Casper mattress comparison, but again, the scores are within .5 points of each other. Predictably, the Cocoon Chill takes the cake in the cooling comparison. The phase change materials in the cover do a decent job of keeping you comfortably cool, even on hot summer nights. 


We measure responsiveness by asking our professional testers to repeatedly change positions on top of a mattress and then rate how easy it was to get comfortable. The Casper received a perfect 10/10 score for responsiveness, while the Cocoon Chill earned a near-perfect 9/10. These are both remarkably high scores for memory foam beds, which have a tendency to preserve body impressions long after the sleeper has moved on.

This category is the most relevant for combo sleepers, who switch from position to position during the night. The Casper does an amazing job of keeping up with your pace, so it’s just a little bit better for combo sleepers.

Verdict: Which Is the Best Mattress?

The Cocoon Chill and Casper mattresses earned similar performance scores, but Casper is slightly better for combo sleepers, side sleepers, and those who use the edge of the bed. Cocoon Chill is the better choice for hot sleepers and couples. Casper is more affordable, except for full and queen sizes.

With such close scores, you may be tempted to think that there’s no way to decide which is the best mattress. To the contrary, one of these mattresses better suits your particular needs. We recommend factoring in the scores for your top 2–3 performance priorities, along with your budget. And don’t forget that you get a 100 day sleep trial and 10 year warranty with whichever mattress you choose.

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