Casper mattresses are easy to try before buying, with a 100-night trial and free returns. The Casper One, the base all-foam model, aims for balanced comfort and support, which works for back sleepers but less so for side sleepers or anyone over 250 lbs. Mattress Clarity's Martin reported good motion transfer reduction and a medium-firm feel around 7/10, with some side sleepers hitting pressure points. The hybrid models add cooling features and spring support; the basic foam models stay middle-of-the-road. Average-weight back sleepers are the right buyer, and heavier or side sleepers should look at alternatives.
Full review
Three foam layers, coils on hybrids
Casper's foam models are a deliberately plain build: a memory foam comfort layer between upper and lower polyfoam, finished at an 11-inch profile in a medium-firm feel. The hybrids change the construction rather than the philosophy, dropping pocketed coils — 616 of them in a queen — beneath the same foam recipe, with phase-change material and aluminium graphite bands on the Snow models under the Three Phase Cooling name. Keeping the range this simple gives it a consistent feel from model to model. It also means far less room to tune firmness or support to a particular body than brands selling the same bed in three tensions.
Medium-firm suits backs, less so sides
Mattress Clarity put the feel at roughly 7 out of 10 on the firmness scale and scored the mattress 3.8 out of 5, describing good motion isolation and enough support to hold a back sleeper's hips level. Side sleepers are the group that keeps hitting trouble: at that firmness the shoulder and hip do not get the give they need, and pressure builds over a full night. Sleep Foundation was warmer overall at 8.8 out of 10, but the split between sleeping positions shows up consistently rather than as one reviewer's outlier. Couples do well out of the motion isolation, which is the clearest thing memory foam buys here.
Cooling that reviewers scored lowest
The cooling models are where the scores diverge most. Nap Lab, reviewing the Cooling Select, gave it 6 out of 10 — the weakest number this mattress carries — and Sleep Doctor landed at 7 out of 10. Owner reports describe the same pattern in the same order: the surface feels genuinely cool to first contact, then settles to ordinary once body heat has been in it a while, with several noting the effect fading after a few months of use. Anyone buying specifically to stop overheating should treat the cooling layer as a mild improvement on plain memory foam rather than the fix.
Foam densities Casper will not publish
The material specification is thin. Casper does not publish foam densities for the layers in a given model, and density is the figure that tells you how long a comfort layer will hold its shape under a body night after night. Without it, durability comes down to trust and warranty terms — 10 years, limited — rather than anything a buyer can check before ordering. That matters most at the heavier end of the range, where the all-foam model has been described as too soft to properly support sleepers much over 200 pounds, and there is no published number to test that against.
A queen at $1,899 with 100 nights
At $1,899 for a queen this is priced as a premium bed and reviewed as a competent one; the 3.7 aggregate reflects broad adequacy rather than any standout result. The 100-night trial and free returns are the strongest part of the offer, and on a foam mattress that matters more than usual, because feel is the one thing a showroom visit cannot settle. Edge support is the recurring weakness against beds at similar money, and heavier sleepers and committed side sleepers are the two groups most likely to use the return policy. For an average-weight back sleeper it is a safe if unexciting buy.
Strengths
- +Easy to try and buy with quick shipping and store availability
- +100-night trial and free returns
- +Minimalist design with smooth gray sock-style cover
- +Good motion transfer reduction for couples
- +Balanced comfort and support suitable for back sleepers
Watch-outs
- −Not ideal for side sleepers due to pressure points
- −May lack sufficient support for heavier individuals (over 250 lbs)
- −No specific foam density information provided by manufacturer
How it compares
The Casper mattress offers a balanced comfort and support feel suitable for back sleepers, but it's not ideal for side sleepers or heavier individuals compared to the Saatva Loom & Leaf, which provides a softer, more conforming surface.
Rating sources
Our 3.7 score is the average of these published ratings. More about methodology.
