U.S. Army Men's Military Heat Socks, 1699-BLACK. Made from 91% acrylic, 5% nylon, 3% polyester and 1% spandex. Ideal alternative to wool socks. Brushed cushioning for maximum comfort. High bulk acrylic yarn for soft feel and comfort. Fine toe seam prevents irritation. These socks are Official Licensed Product of the U.S. Army. Over the calf fitment. One pair pack. Fits mens shoe sizes 7-12. Forest green color.