All the mattresses in our house are memory foam

All the mattresses in our house are memory foam and none of them get hot. We once tried a memory foam mattress topper and that did warm up a bit, and we also had a memory foam pillow that warmed up in the hotest part of summer. If you do have a problem try installing a ceiling fan in the bedroom. They're fantastic. Dial a mattress do a good range of memory foam mattresses.