The Fox River Wick Dry Woodsman Crew Sock is a heavyweight, over the calf sock. Made with Thermolite, these socks keep you warm comfortable in the coldest deep woods frigid mountain excursions. Special upper foot construction eliminates bunching at ankle. Smooth, flat toe seam adds comfort and durability. Fully thermalined construction adds warmth and cushioning. Reinforced toe and heel add comfort and extend product life. Cold weather. Heavyweight. Over the calf height. 53% Thermolite polyester, 21% nylon, 14% worsted wool, 11% acrylic, 1% spandex Made in USA.