Mueller® Hinged Wraparound Knee Brace features a triaxial hinge to track your knee’s natural movement. The fitted sleeve slips on and provides maximum medial-lateral support of your weak or injured knee. Fits either knee.Mueller® Hinged Knee Brace offers maximum medial-lateral support without restricting your mobility. The triaxial hinge ensures proper tracking of your knee joint while the removable patella buttress helps stabilize and protect your kneecap. Antimicrobial treatment controls or eliminates odor.• - Open patella and patella buttress help stabilize and protect your kneecap. - Sectional design and adjustable straps provide controlled compression and a custom fit. - Super strong triaxial hinge follows the complex motion of the knee resulting in near-normal motion that 2-hinge polycentric hinges simply cannot match.