Featuring a proprietary X-PIVOT@trade; rigid hinge designed to provide strong lateral knee support and a more comfortable and natural bending motion for all-day comfort PERFORMANCE TECHNOLOGIES: Easy on/off, wrap-around design Rigid side supports with X-PIVOT(TM) hinge for a smoother, more natural bending motion Open patella with extra cushioning to help hold the knee in its position Adjustable upper and lower straps to help prevent movement of brace Versatile left or right leg use Anatomical, enhanced fit Open behind the knee for added venting and to reduce bunching Copper Infused to reduce odors ADDITIONAL SPECS: Measure thigh circumference 3" above the knee cap S/M = 14" to 19" L/XL = 19" to 24" Hand Wash Cold, Do Not Bleach, Air Dry, Do Not Tumble Dry, Do Not Iron, Do Not Dry Clean CONTENTS: Outer Smooth Fabric: 100% Polyester Outer Raised Fabric: 90% Nylon, 10% Spandex Middle: 100% Synthetic Rubber Lining: 100% Polyester Straps: 50% Polyester, 35% Nylon, 15% Spandex