The breathable, hook-sensitive neoprene vest grips the skin to allow precise placement of the donut-shaped foam pad. The hard-shelled foam pad helps protect the AC joint from further injury. Simply apply adhesive backed hook to the foam pad to prevent migration. No restrictive and uncomfortable straps are necessary! Universal design fits both right and left shoulder. Comes complete with vest, pad and adhesive-backed hook material. Pad is also sold separately and can also be used with the Sully Shoulder Stabilizer.