The Mueller HG80 Knee Brace is simply the most comfortable brace you'll wear. The Mueller-exclusive HydraCinn fabric is a high-performance, moisture-wicking material with an anti-microbial barrier that protects the product (not the skin). 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. It's recommended to help control sublaxating petellas and to help support stiff, sore or unstable knees. Extreme comfort and exceptional support Upper and lower strapping locks brace in position Upper bidirectional stretch material is form fitting and fully adjustable for superior support with no slip Tibial Containment System features a custom secondary shell featuring a stabilizing patella buttress and rear support strap To wear: Loosen straps, slide brace on, align kneecap just above buttress, and secure upper and lower straps Hand wash in cold water with mild detergent Do not use bleach or fabric softener Rinse thoroughly and air dry Please Note: This product contains natural rubber latex which may cause allergic reactions. If rash develops or pain persists, discontinue use and consult a physician. For sizing, measure around the knee