These Socks made of Cloth which and comfortable. Its naturally releases negative ions, waves and far infra-red rays which are highly effective in relieving pain and inflammation. And Its Anti-slip dots socks design which can the efficiency in yoga, pilates, karate, etc. Feature - Color: White. - Material: Cloth. - Size: 28.5x9.5x0.1cm. - Tourmaline infused to help improve blood circulation and micro-circulation within the foot. - The strategically placed tourmaline reflects heat back into the foot to ease pain. - Tourmaline attracts moisture to help reduce sweat by taking it away from the foot. - Perfect for those who suffer from cold feet. - Promote and improve local and systemic blood circulation. - Anti-inflammatory, detumescence role. - Far-Infrared can promote blood circulation and balance body, good for your health. - Anti-slip dots socks can the efficiency in yoga, pilates, karate, etc.