Quales Pro Sport Adjustable, Non-slip Knee Brace with Dual Side Stabilizers & Open Patella Knee Protector - For Running, Arthritis, Meniscus Tear, Left/Right/Behind Knee Pain When Bending Supports knee from arthritis pain and tears along with improving knee function Designed to ease up recovery after surgery or medical procedures Open patella design provides extra secure padding to reduce pain Made with high quality 3mm Neoprene with extra strong Velcro and secure padding Adjustable fit for right/left knee sizes 12-20 inches in circumference with dual stabilizer (4 springs) for extra stability