These are some of the worst memory foam slippers I've come across. They are hard as a rock! They were too uncomfortable to wear; I only tried them on. Unfortunately, I missed the return window so now I'm stuck with a $35 pair of slippers that I wouldn't even want to give away as a gift. I tried to call Tempurpedic to see if I could return direct and they said Amazon is not an authorized third party seller so they will not accept returns.