I have a cool breeze mattress. I bought special to sleep cooler however my tempurpidic sheets done fit well. I bought the mattress protector in hopes it would help with sheets fit Better but the Mattress protector is two inches too big. I was told By customer service it is intended that way so that I could put a topper on top of the mattress which I think is counter productive of you want to sleep a a COOL mattress. So I still don't have sheets that fit snuggly nor a mattress protector (which by the way I'd like to return along with the king topper I purchased.