Men's and women's USB smart warm heating pants plus velvet thickening heating pants★Features:1.3 temperature control, 8 zones heating, (calf, knee, waist, abdomen)2. USB universal interface (not including power bank)3. Metal fiber heating helps you keep out the cold and promote blood circulation4. Thick fleece lining, double warmth★Specifications:Color: black, grayFabric: 95% polyester fiber + 5% spandexLining: 95% polyester fiber + 5% spandexApplicable people: unisexSize: M, L, XL, 2XL, 3XL, 4XL★Package includes:1*heating pants (note: not including power bank)★Easy to maintain:1. Machine washable, hand washable. If it is a washing machine, it is recommended to use a laundry bag for washing.2. Please take out the mobile power before cleaning.★Note:1. This product does not include a power bank.2. The size chart is the size of the pants. Due to the difference in manual measurement, please allow slight size differences.3. Choose the appropriate size according to your dressing habits; for those who like loose or obese, please choose the size that is one size larger.