Make sure he stays warm and comfortable in the outdoors with these Gelert Heat Wear Socks. The thick construction provides both excellent cushioning and great heat retention, while the combed interior feel soft, warm, and incredibly comfortable. . . Standard fit. Combed interior. Thick construction. Firm fit. 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane. Machine washable. Keep away from fire. Imported. . NOTE: This product is sold in U.S. sizes. While the physical product may display both the U.S. & U.K. sizes on it, please place your order using the U.S. size. 193205053541 32359200016 414254