4 pair pack Mens 10-13 Crew Lightweight Merino Wool Socks wool 4 Pair pack. Made in USA 71% Merino wool ,21% Nylon, 7% Poly,1% Spandex Fits Mens Shoe size 10-13 Merino Wool/nylon blend is itch-free and maintains durability for the lifetime of the socks Crew cut (hits below calf). Lightweight cushioning for extra comfort without bulk.