Wrap design with velcro closure and open patella means comfort for tenderness or bruising on the kneecap. Has full-length anterior opening, popliteal cut out and unrestricted knee flexion. Side spirals give additional support. Captures body heat & increases blood flow. Allows skin to ventilate & release moisture. When sizing measure slightly bent around kneecap. Available in sizes Small (12 - 13.5in.), Medium (14 - 15.75 in.), Large (16 - 17.75 in.), X-Large (18 - 19.75 in.) and XX-Large (20 - 21.75 in.).