Hg80 Hinged Knee Brace MUELLER-exclusive HYDRACINN fabric is the moisture-wicking catalyst for maintaining superior support with heat management. Base sleeve is made of antimicrobial fabric that is uniquely breathable, extremely soft to the touch with flatlock seams, and features a conforming hourglass design. Inner grip strips complete the anti-sweat/non-slip design to help prevent brace migration and preserve high-performance support. This ultimate brace provides maximum support for weak or unstable knees, as well as protection after injury. Upper strapping system locks brace in position. Outer mesh shell with bidirectional stretch fabric fastens on the sides then comfortably locks across the quadriceps. Patented Triaxial Hinges provide maximum protection with near-normal knee motion. Tibial Containment System features a custom secondary shell with stabilizing patella buttress and rear support strap. Anti-slip INNER GRIP STRIPS help prevent brace migration. Formfitting HOURGLASS DESIGN with superior support for each Hg80 Knee Brace. Mueller-exclusive HYDRACINN fabric is a revolutionary moisture-wicking and neoprene-free material. Protective Nylon MESH LAUNDRY BAG comes custom-sized for every Hg80 brace to shield your clothing and other equipment in your gym bag or washing machine from hook & loop straps. The open weave design with locking cinch string allows for a thorough yet gentle cleaning. Any Mueller Hg80 brace comes with a FREE custom-sized protective nylon mesh laundry bag, for your convenience. Measure around center of knee: 54015 BXX-Large 20-22 50-55cm 54011 Small 12-14 30-35 54012 Medium 14-16 35-40cm 54013 Large 16-18 40-45cm 54014 X-Large 18-20 45-50cm