+ Lightweight high impact .140 gauge polyethylene molded plastic on both arches and epaulets + Double curved molded epaulets + Adjustable neck opening + AC Channels + Q60 foam + Redesigned, long lasting "B50" elastic + Built in lace-ties + Durable 210 denier nylon body covering resists water and perspiration + Separate closed cell foam hinged deltoid attached to the arch gives maximum arm extension. FB / LB model Shoulderpad Sizing Chart