DexShell Trekking - Waterproof Socks DexShell Model Number: DS636 This is a mid calf length, mid weight merino wool terry loop sock. Suitable for trekking, hiking and activities in arduous wet environments where there is a need to keep your feet from feeling cold and clammy. Outer shell: 96% abrasion resistant nylon, 3% elastane, 1% elastics. Interlining: Porelle waterproof breathable membrane. Inner sock: 40% merino wool, 40% anti-pilling acrylic, 20% nylon. Waterproof and highly breathable Inherently moisture wicking performance inner Mid weight Merino wool terry loop cushion pad running from toe to heel up to calf Comfortable and flexible Colour: Black / Olive Green Sizes: (select above) Small - EU 36 - 48, UK 3 - 5 Medium - EU 39 - 42, UK 6 - 8 Large - EU 43 - 46, UK 9 - 11 X-Large - EU 47 - 49, UK 12 - 14