The Surfanic Aero-Tech No Show sports sock had been designed with a wide and varied range of critically placed technologies. This is to ensure runners get the maximum performance needed. Open mesh construction and sweat wicking yarns for extra breathability. The ergonomic shaped heel and elasticated mid foot band give a snug fit and extra comfort and grip. Mesh Construction For Ventilation No Rub Toe Seam Enhanced Ergonomic Heel For Extra Comfort and Grip Elasticated Mid Foot band For Enhanced Grip Cushion Under Foot One Size 7-11 UK / EUR 41-46 98% Polyester & 2% Spandex