★Heating underwear helps to improve blood circulation, enhance metabolism, which is very suitable for people who are afraid of cold, arthritis, poor blood circulation, and stiff joints.★Features:1.Fast heat, dispel cold and keep you warm.2.Smart heating,3 step temperature control.3.General USB interface power supply4.A good partner for your winter going out.★Specification:Name: Heating Thermal UnderwearColor: BlackGnder: Men, WomenMaterial: Cotton + PolyesterFever area:cheast,belly,shoulder,back,elbow,wasit,Buttocks,tigh,knee,calf(22 zones)Temperature range:40℃-60℃Size:S/M/L/XL/2XL/3XLPower interface:USB InterfacePower: 5V 2A/2.1ARating Voltage:5.0VSuitable season:autumn and winterSuitable scence:fishing,skiing,hikking,camping,etc.★Packaging included1 x Heating Thermal Tops1 x Heating Thermal Pants(Not included Power Banks)★Washing instructions:Please take out the mobile power before washing, machine washable, hand washable, do not wring it out by hand, after washing, it can be air-dried naturally.★At last:Due to manual measurement, please allow 1-3cm error.We will use the best products and services to help you. We hope every customer is happy everyday ^ _ ^