Bridgedale Men's Trailhead Socks 41% Nylon / Polyamide, 29% Merino wool, 29% ENDUROFIL/Polypropylene, 1% LYCRA/Elastane Imported Made with Bridgedale's exclusive T2 anti-compression technology. This knitting process offers an additional level of impact protection; the inner loop has more resilience than the outer loop for cushioning on the achilies, heel, and metatarsal head. Knit with finest wool used in the Bridgedale range: Merino Wool. Merino Wool offers superb softness and touch next to skin. Merino Wool also provides excellent thermal and moisture control properties. ENDUROFIL is a thermal yarn and is combined with Enduro-Wool and Merino Wool for superb wicking and durability. ENDUROFIL is a polypropylene fibre, which also offers high abrasion and wash resistance. Crew height and medium cushioning for added protection.