Select Page

Casper Mattress Review

In July 2017, a subsidiary of JAKK Media LLC acquired Casper provided financial support to allow JAKK Media to acquire Sleepopolis. Derek Hales and Samantha Hales are no longer associated with We maintain an affiliate relationship with some of the products reviewed as well, which means we get a percentage of a sale if you click over from our site (at no cost to our readers). See our full disclosures here.

Casper launched in 2014 and has quickly become one of the most popular mattresses on the internet. The most recent iteration still sports the same latex-like foam over memory foam design that it made popular – and overall I definitely found the mattress to have a lot of the benefits of both types of foam in one mattress (i.e. sleeping cool, having a little “bounce”, and offering the conforming and well-supported feel that people like in memory foam).

2017 Update – Over the years, Casper has had a number of mattress design iterations. If you’re interested in the specific changes, click here to see Casper’s design timeline.

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

Foam Layers

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

  • Top Layer (poly foam) – 1.5″ of responsive poly foam. This layer provides most of the comfort, cooling, and bounce for the mattress.
  • Second Layer (memory foam) – 1.5″ of memory foam. This layer provides support and pressure relief. It is placed below the poly 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 (pounds per cubic foot).
  • 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 layers. It has a density of 1.8 PCF.
Casper mattress layers (top to bottom) - 1.5" poly foam, 1.5" memory foam, 1.5" poly foam, 5.0" base foam

Casper mattress layers (top to bottom) – 1.5″ poly foam, 1.5″ memory foam, 1.5″ poly foam, 5.0″ base foam

This mattress is designed to create a responsive, but contouring feel for sleepers by combining a latex-like foam with memory foam. The biggest detractor to memory foam for some 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 poly foam, you get better cooling and the responsive benefits of poly foam while maintaining the support and body contouring that you get from memory foam.

FAQ:  How to choose a mattress?


The cover of the Casper mattress is a single piece of white fabric on top that runs from edge to edge. The top piece of the cover is stretchy, appears quite breathable, and has a soft texture.

Casper Sleep mattress cover up close

Casper Sleep mattress cover up close

The cover is fairly porous, which is intended to improve the cooling and breathability of the mattress at large.

Firmness, Feel, and 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 personally rate the Casper at a 6.5 out of 10 on the firmness scale.

Casper firmness - 6 out of 10, where 10 is the most firm

Casper firmness – I found the Casper to be medium / medium firm, 6.5 out of 10, where 10 is the most firm.  Note that firmness is always subjective, and that every mattress feels a bit different based on your body type/weight/sleeping position/etc.

The hug and contour of the Casper is a mix between latex-feel and memory-foam-feel (makes sense, right?). Latex (or in this case, latex-like foam is used) is a foam of course, but is a bit less contouring than memory foam, which contours very closely to the body. As you lay on the Casper, how much you sink in depends on your weight (check out my sinkage analysis below), but most people will engage both the top latex-like foam layer and the following memory foam layer. Sinking into the memory foam layer provides a closer contouring feeling than the average latex mattress, but you generally still have the feeling that the mattress takes its shape back quickly due to the top latex-like layer.

Casper Mattress queen size

Casper Mattress queen size

With the top layer of latex-like foam and breathable cover, the Casper is designed such that you should not sleep “hot” on it. In my experience, I had no issue with the Casper sleeping too hot.

GUIDE:  Best mattress for sex

Casper’s Mattress Design Iterations

The following section outlines the major Casper mattress design iterations. Over the past couple of years, Casper has had at least three major design iterations. I have tested the previous iteration, though previous reviewers have tested two of the other iterations (including the original). The three different designs looked like this:

  • First Casper design – 9.5″ total thickness. 1.5″ latex, 1.5″ memory foam, 6.5″ support foam. $850 (Queen)
  • Second Casper design (released May 2016) – 9.5″ total thickness. 1.5″ latex, 1.5″ memory foam, 1.5″ poly foam, 5.0″ support foam. $850 (Queen)
  • Third Casper design (released January 2017; this is the current version that is shipping to customers) – 9.5″ total thickness. 1.5″ response poly (latex-like) foam, 1.5″ memory foam, 1.5″ poly foam, 5.0″ support foam. $950 (Queen)

Sinkage Test

For all Sleepopolis mattress reviews, I like to do four different sinkage tests. These tests are designed to give you a general idea of sinkage based on weight. I use a variety of medicine balls for this test because your body weight, as well as sleeping position and body shape, will result in different forces on the bed.

For this test I use (from left to right) a 6 pound med ball, an 8 pound med ball, a 10 pound steel ball, and a 50 pound med ball.

Sinkage Test for the Casper mattress

Sinkage Test for the Casper mattress

The sinkage results (in inches) are:

  • 6 lb medicine ball: 2 inches of sinkage
  • 8 lb medicine ball: 2.5 inches of sinkage
  • 10 lb steel ball: 3.5 inches of sinkage
  • 50 lb medicine ball: 6 inches of sinkage

As you can see the balls result in differences in sinkage – but not drastically so. In my own experience, I found the mattress to align my spine well in all the sleeping positions (which is really the goal of any mattress).

Motion Transfer Test

Motion transfer is important if you’re sleeping with a parter. Essentially it’s a measure of how much disturbance you will feel if your partner tosses/turns on the other side of the bed, and vice versa. Typically foam mattresses perform better than spring mattresses (this is one of the advantages of foam mattresses), but of course there is some variation within each type of bed as well.

For this test, I drop a 10 lb weighted ball on one side of the bed, then measure the disturbance on the other side of the bed (kind of like a seismograph measurement). The bigger the wave, the larger the disturbance.  The chart below shows three separate drops, one from 4 inches above the bed, one from 8 inches above the bed, and one from 12 inches above the bed.

Casper Mattress Sinkage Test

Casper Mattress Sinkage Test – 10 lb ball drop from 3 different heights above mattress

I interpret the above as minimal disturbance – which is supported by my own personal experience as well. Note I try to be consistent across reviews with these, but this is not an exact scientific test (in terms of ball height, etc.), in case you are comparing results across reviews. Overall I personally think the mattress performs very well with motion transfer, which could be a good option for people sleeping with a partner (especially one that moves around a lot during the night).

Angled View of the Casper Mattress

Angled View of the Casper Mattress


Twin XL$600
California King$1150

Other Details

  • Shipping – Free shipping, comes compressed in a box in 2-7 business days
  • Warranty – 10 years
  • Trial Period – 100 nights
  • Discounts – Save $50 with code SLEEPWELL50
  • Weight – The Queen-size mattress that I received weighs 71 pounds. According to, the King-size mattress is designed to weigh 91 pounds and the CAL King-size is designed to weigh 90 pounds.
Close up of the Casper mattress logo on the side panel

Close up of the Casper mattress logo on the side panel

Who Should Consider A Casper?

  • You are looking for a mattress offering the benefits of latex and memory foam
  • You (or your partner) sleep in multiple positions throughout the night – Casper should accommodate back, stomach, and side sleepers
  • You like the idea of an online mattress purchase – but want to go with an established brand with lots of consumer reviews
  • You want to invest in a quality mattress, but you don’t want to obliterate your bank account


I hope this Casper mattress review was helpful in your decision! You should note that while Casper is one of the brands that brought online mattress shopping mainstream, and they are also available in Target stores nationwide (as well as having their own showrooms in select cities), so they are one of the few “online-only” mattress companies where most people can find a nearby location to actually lay on it before purchase.

Overall my experience with Casper was very positive – the comfort of the mattress definitely stands out from the pack in my mind. With their generous sleep-trial, if the Casper mattress intrigues you, I say go for it!

For more information on the Casper, visit and use code SLEEPWELL50

Page last updated September 6th, 2017

Join the Club!

Join club Sleepopolis for exclusive giveaways, important updates, and more fun stuff.

You have Successfully Subscribed!

Share This