Neoprene wraparound with popliteal cutout Patented clinically-proven FourcePoint hinge technology Versatile strapping allows ACL, PCL, or Combined Instability (CI) configuration IROM hinge ideal for intermediate post-op care Small: Fits 15½ - 18½ inch thigh circumference measured 6 inches above knee center; 13 - 14 inch knee center circumference; and 12...