Ultra Thin sock, made with eco friendly modal and bamboo rayon yarns providing optimum performance. Anti odor and blister free properties give warmth and dry comfort. Constructed with Dexshell's patented 4 way stretch lamination technology 100% waterproof, windproof and breathable Soft Bamboo lining for comfort, temperature regulating and blister prevention Great everyday reliable sock Size Chart     Small = UK 3-5 (EU 36-38) Medium = UK 6-8 (EU 39-42)Large = UK 9-11 (EU 43-46)X-Large = UK 12-14 (EU 47-49)