FEATURE:1.Using polyester and down cotton, waterproof and windproof, warm and breathable, comfortable to wear.2.3 graphene heating zones eliminate muscle soreness and heat up quickly.3.3 level temperature adjustment,the suitable gear can be selected according to the ambient temperature.4.The 5V voltage is much lower than the safety voltage of the human body.SPECIFICATION：Material: PolyesterWeight: 2.6 LbUse time: 10000mAh power bank, 6-12 ​​hoursVoltage: 5VCharging port: USBSize: M, L, XL, 2XL, 3XL, 4XLPACKAGE：1 * Heated jacketNOTE:1.Machine washable, hand washable.2.Please do not wring dry by hand.3.Power bank is not included4.Before washing clothes, take out the mobile power supply to prevent water from entering.5.The use time depends on the actual capacity of the power bank.