What do they call those shoes that have no laces or velcro and are,...?

More like slippers with the rubber bottom of boots? I have a pair I got at salvation army and I've never even online seen a pair that has come close. They are a black fuzzy fabric fake suede with about a inch inch rubber bottom and looks like it's for mountain climing. This pair is dying and I desperately want to find another pair just like them but cant find them or anything even like them anywhere.