1000 Mile Lightweight Walking Sock. 60% Wool, 40% Nylon, inner layer 100% Tactel provides warmth, durability and wicking properties. Suitable for 4 season walking in any kind of boot. (This sock has been used on a Magnetic North Pole expedition as well as wash tested in Himalayan glacial streams and always retains its properties.) *SPECIAL OFFER*Buy 2 pairs for Â£23Buy 3 pairs for Â£33 *If you order either THO133 or THO165 you can have 2 pairs for Â£23 or 3 pairs for Â£33. To take us up on this offer, add the quantity you would like to the cart and then enter "1000 mile sock promotion" in the "special instructions" box in the delivery section of the checkout. Your discount will be deducted when we charge your card after receiving your order... so don't panic when your discount doesn't appear in your confirmation email.