These socks have a chunky ribbed texture, soft hand feel and subtle stretch. They are knitted with warm RWS wool and premium Shokay yak. Recycled polyester is polyester made from PET bottles or end-of-life textile waste. The PET bottles or textile waste are mechanically recycled and processed into new yarn. Shell: 61% Recycled polyester, 29% RWS wool, 9% Shokay yak, 1% Elastane. Excluding trims / Hand wash COS Men's Chunky Ribbed Wool-Blend Socks in Gray Size: 40/42 Men > Menswear > Underwear > Color: gray