ATX Hinged Knee Brace – Breathable Compression Support for ACL, MCL, Meniscus Tear, Arthritis – Adjustable Open Patella Knee Protector Stabilizer – Sports Recovery – Men & Women ATX Hinged Knee Brace OPEN PATELLA DESIGN: This unique design provides patella tracking support and allows proper alignment for your kneecaps and stabilization of the knee joint. Also helps reduce stress and pressure on the knee joint during exercises and heavy usage. *ONE SIZE FITS MOST*: Fits thigh up to 15 – 22 inches, calf up to 16 – 18 inches. Adjustable straps and bendable dual side hinge holds the knee firmly and provides stabilization. This maintains full range of motion and mobility of the knee.