Thermal socks made of 91% Acrylic,8% Polyester,1% Spandex.Our socks experience ultra-plush softness with fluffy fleece material layer inside and textured synthetic blend material on the outside.Imported.Machine Wash.DESIGNED FOR EXTREME TEMPERATURES: 7X WARMER THAN REGULAR COTTON SOCKSThe insulated heated socks have been specially designed to keep your feet warm even when the temperature outside is way too low. The special high-tech fibers with a high level of heat insulation would enclose more of your own body heat. The thermal compression socks are ideal for you if you work outdoors, if you go skiing or if you enjoy hiking, snowboarding, climbing and camping in the mountains during the winter.SNUGLY SOFT AND WARM: Sunew thermal boot socks are not only practical, but unbelievably soft and cozyHeavily brushed fuzzy lining makes these stretchy socks provide warm and comfort for feet in extended outdoor trail cold weather gear. Thick thermal yarn keeps feet warmer for longer. The heated thick socks will keep your feet warm, toasty, fully supported & comfortable. These cushioned socks will be gentle with the skin of your feet and ankles and it will never irritate it nor make it itchy.MULTI-FUNCTION: These unisex thermal socks featured stay-up top keeps from sliding down reinforced heel with deep thick yarn enhance durability various colorful vintage trendy design can be easily match with any outfits.