Features:Dual aluminum polycentric hinges for medial/lateral knee support and hyperextension controlOpen popliteal to eliminate pinching and rubber condyle pads for slip resistancePerforated neoprene material for compression and warmth and terrycloth lining for moisture control and comfortWrap-around style for easy on/off application and stretch webbing straps for maximum adjustability and personal fitBest for walking, hiking, basketball, baseball, tennis, softball, volleyball, wrestling, skiing, running, cheer, track and field, and day-to-day activities