In Consumer Reports' 2026 ratings of innerspring mattresses, which cover 182 rated models, the Casper Snow Max led the category with an overall score of 84 out of 100, with the standard Casper Snow close behind at 82. Cooling performance was one of the standout results behind both mattresses' ranking
How Well Do They Cool?
CR's testing found very little heat buildup in both mattresses. For sleepers who regularly find themselves too warm at night, that's a meaningful distinction. Rather than letting heat accumulate around the body, both mattresses are built with features designed to move excess heat away from the sleeping surface.
Central to this is Casper's HeatDelete Bands, which use an aluminum-graphite material to carry excess body heat through the mattress instead of letting it stay trapped in the foam. The Snow Max takes this further, with six aluminum-graphite HeatDelete Bands compared to three in the standard Snow
Why This Matters for Hot Sleepers
Heat retention tends to become more noticeable as the night goes on, particularly for people who sleep warm. Keeping heat from building up around the body can make a meaningful difference to comfort through to morning.
Consumer Reports, an independent, nonprofit organization that does not endorse products or services, placed the Casper Snow Max and Casper Snow at the top of the innerspring category in its 2026 ratings, giving hot sleepers two options at different comfort levels, both built around the same heat-management approach.
What the Results Mean for Hot Sleepers
For hot sleepers, RTINGS' results provide a useful benchmark for evaluating cooling performance. Independent testing offers measurable data on how effectively a mattress dissipates heat over time, providing a more objective way to assess cooling claims.