Bridgedale make excellent socks, and these Thermal Liners are no different. The extra-fine plain weave material has added lycra for a close fit that improves wicking performance, pulling moisture away from your feet and keeping you comfortable. Recommended for use under another sock in cold weather, the heel and toe are reinforced with Endurofil® for durability.Fibre Content 79% Endurofil® / polypropylene 17%Nylon / polyamide 4% Lycra® / elastane Sizing S = 3 - 5.5 M = 6 - 8.5 L = 9 - 11.5 XL = 12+