Let yourself be seduced by silky comfort and inspired by Performance-Enhancing technologies. X-Socks 4.0 ski Silk Merino 4.0 keep your feet warm and dry during winter Sports. 8% silk and 37% merino fibers Are knitted into the innovative fabric for maximum wearing comfort. The anatomically shaped Foot bed offers a secure hold and thus promotes endurance. Protectors guard The Sensitive areas on the Toes, ankles, heel and Shin bone.