4pairs 15% Merino Wool Long Boot Thermal Socks for Hiking Made in USA wool 100% Made in USA 33% polyester 26% nylon 25% acrylic 15% wool 1% spandex Fits Mens Shoe size 6-12 Wool/nylon blend is itch-free and maintains durability for the lifetime of the socks Calf Height. Shaped cushioning in the footbed for extra comfort without bulk.