The Wigwam Field Boot Sock is a heavyweight thermal boot sock. The soft terry cushioning provides comfort and warmth. 67% acrylic, 15% stretch nylon, 14% wool, and 4% elastic. Thie moisture control system wicks perspiration away. The Wigwam Field Boot Sock stays put under the most strenuous activities. Just enough stretch for comfort and stability. The Field Boot Sock is constructed with a cushioned foot and leg arch panel. Reinforced heel for lasting durability. Ideal for hunting or any outdoor winter activity. Size Large fits women's shoe sizes 10 thru 13, men's shoe sizes 9 thru 12. Color: tobacco.