Wrap around design is ideal for tender, swollen or injured knees with a quick, easy application. Made of sports neoprene for therapeutic warmth with a soft, long loop lining for comfortable wear. Metal medial/lateral hinges in neoprene-covered pockets allow for full flexion and provide stabilization and prevent hyperextension. An open popliteal eliminates bunching and irritation behind the knee. Adjustable support straps. Color: Black. Series Sizes Fits 37-350 X-Small 12 – 13″ 37-350 Small 14 – 15″ 37-350 Medium 16 – 17″ 37-350 Large 18 – 19″ 37-350 X-Large 20 – 21″ 37-350 XX-Large 22 – 23″ 37-350 XXX-Large 24 – 25″ Measure 4″ above center of knee. Fits right or left.