From the Manufacturer
Double flap and strap design plus hook and loop closures provide a contoured, individually-adjustable fit around thigh and below knee. Wrap design provides protection for knees too sore to tolerate a slip-on style support. Two layers of Tradewinds 100% open-cell breathable neoprene surround the patella for added protection without bulk or heat buildup. Comfortable, fully-lined neoprene allows knee to bend slightly while still providing support. Open patella design takes pressure off sensitive kneecap area. Simple inventory: fits right or left, adjusts to fit adult sizes from Small to X-Large.