Heat Holders Thermal Socks, Women's Original, US Shoe Size 5-9, Black 91% Acrylic 5% Nylon 3% Polyester 1% Elastane Imported 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 Women's shoe size US 5-9 The ultimate thermal sock