Hg80 Knee Brace The Hg80 Knee brace is simply the most comfortable brace you'll wear. Supportive steel springs support both sides of the knee, yet still allow leg flexion and extension. So you get the support you need without hampering your flexibility. Recommended to help control sublaxating patellas and to help support stiff, sore, or unstable knees. Upper and lower strapping locks brace in position. Upper bidirectional stretch material is form fitting and fully adjustable for superior support with not slip. 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. The Mueller-exclusive HydraCinn fabric is a high-performance, moisture-wicking material with an antimicrobial barrier. * Nylon mesh Carry Bag protects your clothing and other equipment in your gym bag from hook & loop straps. The open weave design with locking cinch string keeps your brace separate and your bag organized. Measure around center of knee 54111 Small 12-14" 30-35 cm 54112 Medium 14-16" 35-40 cm 54113 Large 16-18" 40-45 cm 54114 X-Large 18-20" 45-50 cm *AEGIS Microbe Shield antimicrobial treatment is intended to protect the brace against odor, staining and deterioration caused by bacteria and microorganisms. This treatment does not extend protection to the skin.