These are head binding RX one bindings. Size is L. These are bindings that you put on by folding down the highback. When you fold down the highback, the side fasteners lift up, making it easy to put on and take off. Although they are new and unused, they have been stored in a warehouse. Thank you for your understanding. Bindings, men's, kids', women's, sp flow 25 26 27 28cm rear entry