MUELLER BULK PRO-LEVEL HINGED KNEE BRACE DELUXE - XXXL Model: B5333XXXL | SKU: MU322322 PRO-LEVEL Hinged Knee Brace Deluxe. Designed for the serious athlete, this high performance brace is ideal for weak or injured knees needing maximum medial/lateral support without restricting mobility. The patented triaxial hinge properly tracks the knee joint and produces near-normal joint motion of the knee, allowing you to uninhibitedly perform at your peak. High strength, patented triaxial hinges allow unrestricted, natural knee movement. Adjustable straps provide controlled compression for custom fit. Removable patella buttress stabilizes and helps protect the kneecap and can be cut to desired shape for proper tracking and positioning. Extra-long for maximum stability and protection. Lockout option for complete immobilization and adjustable extension stops at 10, 20, and 30° for limited range of motion if used as a rehab brace (tool kit included). Fully-trimmed edges with smooth seams help prevent irritation and chafing. No bunching with open back design.