SB04 Shoulder SupportThe key feature of our SB04 is the X Strap, which fits over the brace and helps to keep it in place on the shoulder. Provides superior compression and support for past shoulder injuries Heavy duty molded EVA shoulder cup with 1680D ballistic nylon Adjustable arm closure design eliminates underarm chaffing Universal no snag design fits left and right shoulders Easy on off design X Strap Stabilizer and Impact System Sizes: S, M, L, XL, XXL