3 Pair Mens Heated Thermal Work Boot Socks Winter Gear Anti-Bacterial Treated Moisture Control Ski Snow School Warm More Value for your dollar 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane THERMAL WARMTH HEATED SOCKS - maximum heat using our special knitting method and high yarn allows these socks to keep your feet warm for a much longer period then ordinary thermal socks. BOOT LENGTH - Men's size 10-13 Shoe Size 7-13 - with a thick cushioning to keep you comfortable and warm all day long HIGH BULK YARN - The special acrylic yarn gives a high thermal capacity and at the same time keeping the socks lightweight and comfortable TOG RATING OF 2.3 - which help keep your feet warmer to -30 degrees Celsius which is -22 Fahrenheit STAY UP TOP - These socks have elastic at the top to keep them from falling and slipping during wearing - Machine Washable Free Shipping Brand new Buy with confidence!