I sleep with just a mattress on the floor since my senior Mini-Dacshund started sliding off my bed in his sleep. It can get uncomfortable. BUT, since I added this to our set-up, we are all, the Doxie, Chihuahua and me, so super comfortable it is hard to believe it is the same bed!! I did so much research before choosing this topper and it is perfect! I have had it for over a month now and all my sheets fit perfectly, we sleep better than ever and I do not get hot from it at all. I have MS so I promise I would tell you if this caused me to overheat! Highly recommend ❣️