Mueller? Hinged Knee Brace features a triaxial hinge to track your knee?s natural movement and helps prevent medio-lateral movement of the knee. The Mueller? Knee Brace also provides support to weak knees and joints. Fits either knee.- 360? straps to help better maintain positioning on knee while providing secure comfort around the leg.- Anatomically correct patella to better help stabilize, cushion, and protect knee cap.- Spandex heat and moisture management window behind knee for comfort and breathability.- Helps Prevent hyperextension of knee. Instructions:? Loosen all straps.? Slide knee brace on.? Align patella opening over your kneecap.? Secure top and bottom straps.? Adjust for comfort. Care:Hand wash in cold water with mild detergent. Do not use bleach or fabric softener. Rinse thoroughly and air dry.