My wool mattress topper is excellent for keeping me cool. As a lady "of a certain age" I was suffering with hot flushes and horrendous night sweats. Unfortunately my relatively new Tempur mattress was making things far more difficult than they needed to be. The wool topper has made things so much more comfortable without having to ditch the expensive mattress. The only downside is that the straps used to keep the topper in place are stitched much too close to the corner so they slip off. I have had to stitch new straps on to keep the topper where it needs to be.