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Casper Mattress Review

Sleepopolis is supported by readers. Product links on Sleepopolis are referral links. If you use one of these and buy something Sleepopolis makes a little bit of money. Need more info? See how it all works here.

I have no direct referral relationship with Casper, but I receive money from if you use the links below to buy a Casper. In April 2016, Casper sued me in federal court over my reviews and I am fighting that lawsuit. The review below, like all my reviews, reflects my honest opinion.

2016 Update – After over two years of mattress testing and sleeping on over 75 different mattresses a lot has changed since I first tested Casper. Among these changes include Casper re-designing their mattress in May 2016, which added a new layer of polyurethane foam between the memory foam and base foam. Below is my updated review, including improved pictures, updated video (coming soon), and updated analysis.

If you’re reading this Casper mattress review then chances are you’ve already heard a bit about the new mattress company on the block. Casper is a new type of mattress company for a new type of consumer.

Casper launched in 2014 and has quickly become one of the most popular mattresses on the internet. It’s hard to browse the web, drive your car, watch TV, or listen to the radio without hearing or seeing Casper ads.

But does Casper really live up to all the popularity and hype? Continue reading below to find out!

Thinking about buying a Casper? Do your homework! Check out these 4 mattress companies that Sleepopolis loves.

In a rush? Click here to jump to the Casper review summary.

Foam Layers

The Casper is an all foam mattress utilizing 4 different layers of foam.

  • Top Layer (latex foam) – 1.5″ of synthetic Dunlop latex foam. This layer provides the comfort, cooling, and bounce for the mattress. It has a density of 3.3 PCF (pounds per cubic foot).
  • Second Layer (memory foam) – 1.5″ of memory foam. This layer provides support and pressure relief. It is placed below the latex foam layer to help avoid any potential heat retention issues that can sometimes result from memory foam. It has a density of 4.0 PCF.
  • Third Layer (support foam) – 1.5″ of poly foam. This is a transitional poly foam designed to help ease sleepers into the base foam. It has a density of 2.5 PCF.
  • Bottom Layer (support foam) – 5.0″ of support poly foam. This layer of foam acts as the foundational base for the mattress. It supports the above comfort layers. It has a density of 1.8 PCF.

This foam mattress is designed to be the best of both worlds from latex and memory foam. The biggest detractor to memory foam is its tendency to “sleep hot”. The memory foam absorbs heat and creates a core of support and pressure relief for the mattress. By putting the memory foam below a top layer of latex you get the great cooling and comfort benefits of latex, while maintaining the great support and body contouring that you get from memory foam.

FAQ:  How to choose a mattress?

Casper mattress foam layers

Casper layers (top to bottom): 1.5″ latex foam, 1.5″ memory foam, 1.5″ transition poly foam, 5.0″ base poly foam


The cover is simple and has become somewhat of the standard design for many online mattress companies. There is a single piece of white fabric on top that runs from edge to edge. The top piece of the cover is stretchy, quite thin, and has a soft texture. The textiles and other materials used within the cover are sourced from the USA and imported from Belgium.

The cover is fairly porous, which helps improve the cooling and breathability of the mattress at large. However, you’ll want to be very careful when moving the mattress around. When I was moving my first Casper mattress it got caught and ripped several threads out of the cover, creating a small hole. The white fabric on top is not very durable and seems to be prone to tearing if you’re not extremely careful.

From a functionality standpoint the cover meets its basic requirements. The thinness of the cover also allows sleepers to more directly feel the foam layers. The top portion of the cover (the white piece) is 100% polyester, side panels are 51% polyester and 49% polypropylene, and the bottom is a blend of 50% rayon, 45% Polyester, and 5% aramid (synthetic polymer, similar to nylon).

Casper mattress cover close up

Close up of the Casper mattress cover

Firmness, Feel, & Support

The Casper mattress has a medium feel. Casper is a “universal comfort” or one-size-fits-all mattress design. The foam layers and materials were selected because they create a feel that’s designed to be suited to the needs of most sleepers. I would rate the Casper at a 6-7 out of 10 on the firmness scale.

Casper firmness - 6-7 out of 10 on the firmness scale (10 being the most firm)

Casper firmness – 6-7 out of 10 on the firmness scale (10 being the most firm)

However, the Casper can feel firmer and unsupportive for heavier sleepers. Casper gives no formal weight recommendations or limitations on its website, however, I recently chatted with a Casper’s chat support who told me the following:

“The Casper was designed to hold a combined 450 pounds [for couples]. For optimal performance, we recommend that individuals be 250 pounds and below. If you are over this weight, you may find that the Casper is not firm or supportive enough for you”

With only 3″ of true comfort layers (1.5″ latex + 1.5″ memory foam) heavier sleepers can easily sink through these layers, forcing the transitional poly foam and base foam to engage more with sleepers. Based on feedback from my readers over the last 2 years, I feel that heavier sleepers should avoid the Casper.

The top layers of the Casper are fairly soft, allowing for about 2″ of sinkage (see below for specific sinkage measurements), but beneath these soft layers is a noted “support wall” that sleepers quickly hit.

The addition of the transition poly foam that Casper added in May 2016, helps to ease the transition, but it’s still more sudden that I would like. Depending on your sleeping position and preference, that type of support may be well suited to you, however, many heavier sleepers and side sleepers especially may find the support too abrupt, creating pressure points.

The hug and contour of the Casper is fairly standard. Having latex on top eliminates a certain degree of the sharpness in the contour that you would get with a 100% memory foam mattress. The contour reminds me a bit of a trampoline. There is a generalized compression around your entire body where pressure is applied, creating a type of bowl sinkage effect.

During my sleep test I never felt particularly hot or uncomfortable on the Casper. If you have average cooling needs the Casper should do a fine job of keeping you cool.

Overall, the Casper mattress has average support in all sleeping positions.

The one exception to this would be on the edge support. In comparing Casper to the universe of competing similar online foam mattresses the Casper is among those with the worst edge support. You’ll experience ~5″ of sinkage when sitting directly on the edge.

Additionally, you cannot sleep close to the edge without rolling off. If you sleep on or use the edge of your mattress for your daily routine, watching TV, sex, etc. be prepared for lots of sinkage.

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Casper mattress review

Casper mattress, King size, platform bed

Sinkage Test

For all Sleepopolis mattress reviews I like to do 5 different sinkage tests. These tests are designed to show you how the mattress performs in varying positions and to give you an idea of the sinkage / hug you’ll experience with the mattress.

  • Lying on back – In a normal lying position on my back, I experienced 1-2.0″ of sinkage. The hug is more generalized and does not sharply contour to your body (applies to all positions).
  • Lying on side – In a normal lying position on my side, I experienced 1.25-2.25″ of sinkage.
  • Sitting on edge (conservative) – In a normal edge sitting position (where I’m sitting a bit farther back on the mattress), I saw 3.5″ inches of sinkage.
  • Sitting on edge (aggressive) – In the more extreme position, with all of my weight on the absolute edge of the mattress, I saw 5″ of sinkage.
  • Standing in middle – Standing in the middle of the mattress with all of my weight focused on the same area, I experienced 6″ of sinkage.

Bear in mind that I weigh 140 pounds. Your sinkage results will vary based on your weight and body type.

Casper mattress angled view

Casper at an angled view


Twin XL$600
California King$1150

Other Details

  • Shipping – Free shipping, comes compressed in a box in 2-4 business days (2 day shipping with Amazon Prime)
  • Warranty – 10 years
  • Trial Period – 100 nights
  • Discounts – None currently available on Sleepopolis
  • Made in the USA – Some materials sourced from Belgium, most materials from the United States
Casper mattress logo close up

Close up of the Casper logo tag

Is the Casper mattress right for you?

When I first tested the Casper mattress, I was fairly impressed. I upgraded to the Casper after sleeping on a low-end spring mattress that was about 8 years old. The Casper was a massive upgrade over that mattress and by most standards is still a very good overall mattress.

That said, over the course of the last 2 years I’ve tested virtually every online mattress (about 90 different mattresses), including all of Casper’s primary competitors. My conclusion at the end of these sleep tests is that, while the Casper is a pretty good mattress, there are many other mattresses that offer better quality and better performance for the same amount of money.

COMPARISONS:  See how Casper compares vs. others

The biggest issue with Casper is it only has 3″ of true comfort foams (1.5″ latex + 1.5″ memory foam). The recent addition of the 1.5″ of transition poly foam did help to improve support, but it’s not enough in my opinion. This new poly foam feels more like a base foam than a comfort foam.

All things considered, the mattress still has a similar feel and continues to suffer from the same basic support, comfort, and edge support issues.

Final Summary – The Casper is an above average 10″ foam mattress, but it’s not above average enough. There are simply too many other mattresses available that I find offer better support, comfort, and feel for about the same price (some even less). For these reasons I recommend other mattresses ahead of the Casper including: Leesa, Loom & Leaf (little pricier, but you get some nice extras), Helix, and Brooklyn Bedding. All offer improved performance at a better value compared to the Casper.

Page last updated September 16, 2016 by Derek Hales.

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