Prevents sports and work related knee injury Give a proper support can compression 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. Prolonged wearing can promote blood circulation, reduces pain and swelling, speeds up recovery, also prevent injury as well.