Does this foam mattress sleep hot?

It runs cooler than most all-foam beds. Peak surface temperature holds around 31.2 C, earning a cooling score of 6.6 out of 10, helped by a breathable cotton-blend cover and a firm surface you lie on top of rather than sink into, so less of your body is wrapped in foam. A solid foam core still circulates less air than a coil bed, so the cover does the cooling work here.