Relwase natural far infrared rays and anion. 3D knitting technique. Wear for long time with comfort. Color: GrayPack: Single packMaterial: Carbon FiberMade in TaiwanSupports made fron Carbon FiberRelwase natural far infrared rays and anion.3D knitting technique.Wear for long time with comfort.Carbon FiberAbsorb and transmit moisture and odor on skin quicklyFar infrared rays advance blood ...