I put this on my Temperpedic mattress because I was sweating to death at night even with a "cooling" mattress pad. Since putting this on my bed, I am noticeably less warm at night and certainly not as sweaty! It's been a life-saver! The backing is a bit on the cheap side--I am afraid I'm going to rip it when I straighten it at the corners. Also, while you can wash this in a machine, they recommend that you line dry it instead. That was a disappointment. But other than that, I'm very pleased!