Heat Holders Men's No1 Thermal Socks Long Ski Black/Red 7-12 us 91% Acrylic 5% Nylon 3% Polyester 1% Elastane machine washable Thick, chunky and with a massive tog rating of 2.34 for warmth -7-12 us The extra long, thickly padded sock is ideal for skiers and all winter activities Brushed inside to hold heat within without sweating - Long Knee length Ideal inside ski boots and for anyone who works outside in cold temperatures An ideal Gift- Women's and children's versions in my Amazon shop