Heat Holders - Men's Workforce with Reinforced Heel and Toe - Size 7-12 Us Machine Washable Mens Workforce with Reinforced Heel and Toe, Combining the Heat Insulation Innovation of Heat Holders and the extreme durability of Workforce The specially developed advanced fibers provide high performance insulation against cold with superior moisture wicking abilities The innovative long looped thermal pile knitting technology products a unique, extra-long looped cushion pile to hold in more warm air, increasing the thermal tog rating Using an intense brushing process produces a soft brushed inner fabric that maximizes the amount of warm air held inside the socks for all-day warmth and comfort. Contains a Thermal Tog rating of 2.3, keeping your feet toasty and warm throughout any weather, all day on any day. Also fits Men's 7-12 Us