Lorpen Unisex Freeride Overcalf Sock 37.5% acrylic Unisex freeride overcalf fun sock Stay warm, stay dry, ride hard. These socks only improve your situation. 37.5% merino, 37.5% acrylic, 15% nylon, 10% lycra merino blend keeps feet dry, warm and quick drying great value, great fit, great socks