SpecificationOuter: polyester fiberLining: polyester fiberWaterproof: YesWindproof: YesMachine washing: AcceptedPower: 5V 2A (suitable for most power bank in the market)Rating Voltage: DC/5.0VTemperature Level: H(red)--50℃,M(white)--40℃,L(blue)--30℃Heating Panel: 10 pcsSuitable people: men/womenApplicable season: winterFeatures: Lightweight, USB Charging, 3 Heating Levels, Washable, warm & comfortable, wind-proof and water-repellentPackaging included1* Heated Vest (no battery pack )The size of the heated vest is the Chinese size, which is 2 sizes smaller than the European size. Before ordering, please measure your usual clothes and choose according to the length, bust, and shoulder width in the size chart.