My boys (11 & 9) both have an Occulus Rift S and these covers are important. The OR comes with a foam padding around the eyes which is not able to be removed for cleaning or replaced. They fit on easily and stay on. They are comfortable on their smaller (than adult) faces. One of their friends has used his OR without a cover and the foam has become smelly and stiff from sweat. Gross. He has now bought one of these covers too.