The polyester sports sleeve is to cover the knee brace to protect the frame from damage and to also cover the rigid parts when participating in in team sorts which may incur impact with other players. It is a pull on polyester sleeve that had neoprene padding in the correct places over the metal hinges. Can be bought to cover one of the above compatible braces. They come as a single and do require the brace to be bought separately.
Size is compatible to the brace you have previously purchased.