Bridgedale Xhale Speed Demon Socks,Slate Black,Large 55% Nylon / Polyamide/ 23% Endurofil / polypropylene/ 20% Merino Wool / laine merino/ 2% Lycra / elastane Imported Ideal for running and cycling Improves heel retention Ultra thin body and toe box Double loop cushioning for hot spot protection Ultra thin fit, cooling ventilation. Mapped cushioning and heal retention