Wigwam Men's El Pine Sock, Red Heather - Large B(M) US wool Classic, natural ragg wool provides thermostatic insulation to keep feet warm and dry True fit leg prevents sock from slipping Fortified heel and toe pockets offer a comfortable fit; Low profile toe closure minimizes irritation in toe area Helps relieve Blisters, Foot Odor, Foot Perspiration, Hyperhidrosis 81% wool, 15% nylon, 4% spandex; Made in USA