Twin size, Minky backing. Bought it for my 3 year old. He slept in it for a week and never used the comforter part so I don’t see the purpose of having a beddys for the base (gotta love toddlers 🤣) There is a little tear (it’s not a full tear so I’m not sure what to call it as it doesn’t go through the whole fabric) on the base. Picture is attached.