Bike Heavy-Duty Hinged Knee Brace with Aeroskin

Features Geared, polycentric hinges Sturdy aluminum uprights Contoured rubber covering Nylon-covered, 1/8-in neoprene Pull-up loops Sizing (measure around knee joint) Small: 13-14 in Medium: 14-15 in Large: 15-17 in X Large: 17-19 in XX Large: 20-22 in