Wrightsock Men's Fuel Lo Single Pair Socks, White/Grey, Sock Size:10-13/Shoe Size: 6-12 Inner: 70% Polyester, 26% Nylon, 4% Lycra Spandex; Outer: 68% Polyester, 24% Nylon, 8% Lycra Spandex Machine Wash Two layers trap air for effective insulation from heat and cold Improved moisture management Interaction between layers absorbs friction and prevents blisters Maximum comfort Guaranteed blister free You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!