Prevents sports and work related knee injury Lateral spiral stays provide good stabilization Relieve pain and swelling Speeds up recovery Ideal to prevent and support the sports and works related knee injury. This product is made of circular knitting bandage to provide maximum comfort, compression, heat therapy, and support to the knee. The internal material is the cotton can absorb the moisture and the knitting bandage can provide free ventilation. The lateral stays offer additional support and stability and open patella can position the knee and avoid the displacement. Prolong wearing can promote blood circulation, reduces pain and swelling, speeds up recovery, also prevent injury as well.