Same as the backs on the interactive pins. My husband started me on the pin collecting while we were at Disney 3.5 weeks ago. After coming off Space Mtn the CM asked me if the pin in the seat was mine. Sure enough the back had come off my interactive pin and the pin was sitting in the seat. Thanks to the CM for calling me back. Anyways, I did go and buy the pack of 12 rubber backs for my pins. As soon as a new pin was bought the back was replaced.