These socks are made using a proprietary blend of specially sourced yarns . They are 200 needle knit crew made from 58% Recycled Polyester 22% Nylon 15% Cotton and 5% Elastane. They are a true one size fits most, and are available up to size 12 Men's (U.S.). These socks have an unprecedented amount of stretch with durable print quality. .: Material: 58% recycled polyester, 22% nylon, 15% cotton, 5% elastane.: 200 needle knit premium socks.: One size fits all (W's size 5 US up to M's size 12 US).: Please note: product may bleed color on first wash