I decided to test these out since I sleep hot and need to be cooled down. I have the Breeze mattress so I figured since these claim to "breathe" that they'd be perfect. Well, they don't and in fact they're almost as warm as regular cotton sheets. I only used them once and I tried to return them but thanks to Tempurpedic's return policy, I have to eat the cost of these. Severely disappointed with the quality and fit of the sheets as well.