76% mercerized cotton, 22% polyamide, 2% elastane Available in European sizes 39-42 and 43-46 Mercerized cotton for durability, reduced shrinkage and clear, beautiful colors Timeless style lasts even longer with the ECCO CLASSIC RIBBED MID-CUT SOCKS. These men’s socks are knitted from a premium mix that includes high-end mercerized cotton, which enhances durability and helps to reduce shrinkage while ensuring clear, beautiful colors. With a very fine knit with an irregular rib, these socks also contain some elastane for some stretch and added comfort. Very fine knit with an irregular rib Classic style