The Evolution sock is a waterproof sock which has been thoughtfully designed featuring a breathable stretch waterproof bonded membrane to keep you warm and dry in very wet conditions. It has a seamless construction for your comfort and a soft warm close to the skin layer. Features Waterproof XDRY by Extremities Seamless construction for comfort Soft, warm, close to the skin layer Ideal for cyclists, runners, and much more Technology X Dry by Extremities The X Dry technology is a fully waterproof fabric used on a huge amount of our products. X Dry features a water-resistant shell that repels water particles away from the fabric, using the waterproof and breathable X Dry membrane, whilst retaining heat. Specifications Colour Black Outer 63% Nylon, 20% Elastane, 17% Wool Inner 80% Viscose Fibre, 20% Wool Guarantee New Extremities products are guaranteed to the original owner for a period of 1 year from the date of purchase. Size Guide Sock Sizing Our socks are sized small to x-large, the equivalent shoe sizes are shown below. If you are between sizes we suggest you choose a smaller size. Sock Size UK Size Euro Small 3-5 35-38 Medium 6-8 39-42 Large 9-11 43-46 X-Large 12+ 47+ Video