Our "barely there" sock, the Women&&';;s Foliage Lightweight Crews are made of a Fine Micron Merino Wool, creating a smooth, lightweight, and comfortable fit that adapts to temperatures year round. They&&';;re so comfortable, you might forget you&&';;re even wearing them. Materials 55% Merino Wool, 41% Nylon, 4% Spandex Care Machine wash cold on a gentle cycle, with socks inside out. Do not bleach. Line dry or tumble dry low. Do not iron. Do not dry clean.