Mens Non Elastic Extra Soft Top Warm Thermal Socks (Pack of 6) Cotton, Polyester, Sizes US 6.5-11.5. Mens high quality thermal socks ideal for cold winter days or even skiing. Socks have no elastic top and stay up with comfort. Fiber: 50% Cotton and 50% Polyester. 2 x Black Pairs, 2 x Navy Pairs and 2 x Dark Grey Pairs.