CEP Men's Compression Ski Socks Polymid 91% / Spandex 9% Imported Achilles Heel Support additional support of the Achilles tendon protects and prevents irritable tendons A physiologically perfect compression profile for great performance longer endurance and faster recovery More energy stamina and performance Anatomically shaped seams, padding and flat toe seam Anatomically shaped seams, padding and flat toe seam Adjusts to the anatomy of the foot for a perfect fit thanks to Medis three-dimensional manufacturing process