Features:-Intelligent temperature control, heated with knees and waist.-Powered by any 5V / 2A USB portable charger, the USB plug is compatible with most portable chargers on the market.-3-level adjustable temperature with indicator light to adjust the required temperature.-Humanized design: elastic waistband design, power pocket, back zipper pocket, convenient and practical-Support manual/machine washing.The safety protection function ensures that the machine is not damaged during washing.Specifications:Name: Heating woolen pantsColor: BlackFabric: 64.5% rayon, 30% polyester, 5.5% spandexLining: 100% polyester fiberHeating temperature: Red LED 50℃, White LED 40℃, Blue LED 30℃Power supply: USB power bank (not include, 10000mah power bank can be heated for about 6-7 hours)Size: S,M,L, XL, 2XL, 3XLSeason: Autumn, winterPackage includes:1 x Heated Thermal Underwear Pants(NOTE: NO POWER BANK !)Cleaning and maintenance:1.Machine washable. When washing, remove the power bank.2.In the case of machine washing, please wash your clothes in a laundry bag.3.To ensure the longevity of clothes, try to avoid strong washing and normal drying.