Item Code:HJ - 909 Item name: Pressure type elbow pads Main material: sponge + long hair mercerized cloth Size: 22-26.5 cm Function: it can fix ankle joint, prevent ankle joint sprain, and prevent Achilles tendon from overstretching. The tightness can be adjusted at will.It fits your ankle better Parts.Bamboo charcoal with far infrared radiation, can penetrate the blood vessels, stimulate the meridians and acupoints, improve the body function.