Bridgedale Men's Coolfusion Run Speed Trail Socks 55 % Nylon Polyamide, 22% Merino Wool, 21% Coolmax Polyester, 2% Lycra Elastane Imported Lightweight Merino A great sock for trail or mountain running Merino Wool for added comfort and softness Extended above ankle cuff T2 padding and ventilation 3 Year Guarantee