We purchased this mattress topper for our RV mattress. As a side sleeper, I was tossing & turning frequently during the night, due to the hard mattress causing hip & back pain. Since we live in Florida, we were concerned about frequent comments that memory foam is hot to sleep on, especially since we would be using it while camping, but this mattress topper kept us cool. It alleviated the hip/back pain, too. We're considering putting one on our king bed at home!