Does this mattress sleep hot?

No, it sleeps cooler than its price suggests, scoring 9.2 on cooling with a surface peaking around 30.9 C. The cooling is structural: 2 inches of gel-infused foam at the surface draw warmth off the skin, and the 815-coil pocketed layer below keeps air circulating instead of letting it stew in dense foam. For a value hybrid, that is a genuinely cool-sleeping result; you start cool and wake cool.