Shupaca Alpaca Wool Socks, Temperature Regulating, Moss Stripe, Medium Size: Medium, Mens 9-11, Womens 8-11 Green, gray and black striped socks Made from hypoallergenic alpaca wool, temperature-regulating. Keeps feet warm during the winter, and cool during the summer. Machine-wash delicately, hand wash, or dry clean, hang to dry or tumble-dry in low power Materials: 48% baby alpaca wool, 40% acrylic, 10% nylon, 2% lycra