Our 5” CeramicSpeed sport socks, made by DeFeet, guarantee you long-lasting performance, durability and comfort. Proudly show you're on the CeramicSpeed programme, with bold logos on the sides and our Part of the Victory slogan across your toes. DeFeet's venting mesh weave gives you game-changing airflow. The ultimate high-performance socks! Made from (all recycled) fiber, with a StayFast cuff and reinforced heel and toe. Materials: 60% nylon, 39% COOLMAX Ecomade, Lycra SIZING GUIDE Defeet size S M L XL Euro size 36 - 39.5 40 - 42.5 43 - 45.5 46 - 48 UK Female 4 - 7 7.5 - 9 9.5 < UK Male > 6 6.5 - 8.5 9 - 11.5 12 < US Female 5.5 - 9 9 - 11.5 12 < US Male > 6 7.5 - 9 9.5 - 12 12.5 - 15 Centimeter 22.5 - 25 25 - 27 27 - 29 29 <