Oppo Guardian Knee BraceFeatures: Swiveling Angle Controller Easy Fastening System 4 straps design forms a reliable 4 point fix, the perfect stabilization. This extended length completely protects knee joint and surrounding soft tissue and immobilizes the affected area to help prevent further injury. OPPO CoolPrene material generates a pumping action on soft tissue during motion, creating a "micro massage effect" to promote circulation and proprioception. It reduces swelling