Our DONJOY Performance Trizone Knee Sleeve is a unique hybrid design combining the properties of compression and bracing in a single sleeve. The carbonized bamboo circular knit construction allows for targeted, zonal compression around the knee joint with anti-bacterial and thermal regulating properties. Three distinct compression zones which include: a stability zone with strategically placed injected silicone to provide support for the knee joint and the benefit of enhanced proprioception, a compression zone which improves circulation and provides mild support to the joint structure and surrounding muscle tissue, and a comfort zone that provides lighter compression for enhanced fit and better range of motion. The Trizone knee support is a low profile performance product designed to keep you moving through repetitive motion injuries including strains, inflammation and swelling, tendonitis and soreness. Key Features & Benefits Three Zones of Compression Strategically Placed Around the Knee to Deliver Peak Performance. Silicone Banding Injected Directly onto the Sleeve Offers Bracing and Support. All-Natural Carbonized Bamboo Is Thermal Regulating and Anti-Bacterial Helping Eliminate Odors. Stash Pocket Holds Cards and Keys. Anti-Migration Technology Helps to Keep the Sleeve Secure to the Thigh and Eliminate Slip. Reflectivity for Enhanced Visibility in Low Light Conditions. Size Chart & Fit Help Circumference Thigh (Above knee 15cm) Knee Center Calf (Below knee 15cm) XS 13.0''-15.5'' 12"-13" 10"-12" S 15.5"-18.5" 13"-14" 12"-14" M 18.5"-21" 14"-15" 14"-16" L 21.0"-23.5" 15"-17" 16"-18" XL 23.5"-26.5" 17"-19" 18"-20" Measurement taken at the center of the knee (directly over patella)