I really give these sheets a 0. I purchased these queen size sheets hoping they would stay on our Ergo Tempur-Pedic. I am beyond angry that I spent $185.92 on very thin sheets that absolutely do not stay on the mattress correctly. Every night I get up to tuck the sheet back under the mattress. The bottom sheet's corner straps do not work, and there is nothing wrong with the mattress. A waste of money!!!!