Full Foot Heating Socks Winter USB Charging Warm Heating Socks Ski Electric Heating Socks Features: PREMIUM MATERIAL: cotton is added, so it is absorbent, breathable, quick-drying and elastic. Applicable occasions: Focus on the toes, prevent the feet from getting cold, and promote blood circulation. Great for arthritic feet and chronically cold feet and stiff joints, giving you a warm winter. Heater: The heater is inside the sock. The specially designed battery pouch is safe and convenient to carry. Rechargeable Heated Socks: Rechargeable lithium battery heated socks for cold weather activities or winter outdoor sports, winter ski hunting, camping riding and motorcycle warmth. Because the heating wire inside is made of carbon fiber wire and imported from Japan, unlike metal copper wire, which conducts electricity, it can also be cleaned in the washing machine, and there is no need to worry about the problem of cleaning the hair coat. Product Working voltage: DC3.7~5.0V Working current: 950mA~1250mA Battery life: 7V-4000mAh power bank High-grade 3.5-4.5 hours 55-65 degrees Mid-range 55-7 hours 45-55 degrees Low gear 8-10 hours 40-45 degrees Weight: 175g/pair (without battery and plastic bag) Size: natural length Toe to heel 19cm (maximum stretch length 27cm) Heel to sock mouth 32cm (maximum stretch length 38~40cm) The natural circumference of the sock is 18cm (the maximum stretch circumference is 34cm) Suitable season: winter Applicable gender: unisex / male and female Size: 32x19CM 2x heated socks