The Mueller Hinged Wraparound Knee Brace offers support to weak, injured or arthritic joints. It also helps prevent medio-lateral movement of the knee. This knee brace fits both the right or left knee. Made with the highest quality materials to ensure long-lasting durability. To clean, hand wash in cold water with mild detergent. Do not use bleach or fabric softener. Rinse thoroughly and air dry. Features: Metal triaxial hinge allows for unrestricted natural movement. Sectional design and adjustable straps provide a custom fit. Open patella helps prevent slippage, Open back eliminates bunching. Helps prevent hyperextension of the knee. Please Note: Constructed of a neoprene blend which may cause skin irritations. If rash develops or pain persists, discontinue use and consult a physician. Not made with natural rubber latex. Instructions: Loosen all straps. Align patella opening over your knee cap. Fasten bottom and top section. Secure bottom and top strap. Sizing: Small/Medium: 9" to 14" ankle circumference. Medium/Large: 12" to 20" ankle circumference. Large/X-Large: 17" to 26" ankle circumference.