Lorpen Cold Weather Sock System,Grey,X-Large 37.5% Merino/ 37.5% Acrylic/ 15% Nylon/ 10% Lycra Imported Cold Weather Sock System - Italian wool outer, merino liner Italian Wool has been blended with Acrylic yarn to be soft, warm and quick drying High Lycra content keeps the socks wrinkle free and in place Great value - two socks for the price of one. Machine wash and dry.