The Hg80 Premium Hinged Knee Brace;is simply the most comfortable brace you' ll ever wear. Improved Mueller-exclusive HydraCinn fabric is a high-performance, moisture-wicking material with an anti-microbial barrier. * The ultimate brace for weak or injured knees. The Triaxial Hinge is the standard by which all other hinged knee braces are judged. It closely simulates the natural tracking of the knee joint. Recommended to help control sublaxating patellas and to help relieve pain associated with Chondromalacia (irritated kneecap).