Bridgedale Vertige Mid - Women's 100% Other Fibers Imported Merino wool provides excellent thermal and moisture control properties Lycra Fibers give Bridgedale socks long a lasting fit and comfort, keeping their shape wash after wash The latest in fiber and design innovations for endurance sports and outdoor activities 25% Merino wool, 25% enduro/Polypropylene, 48% nylon/polyamide, 2% lycra/elastane