Feature:USB charging and heating vestMany occasions: Keep your child warm while exercising outdoors, such as riding a motorcycle, hiking, camping, fishing, and outdoor activities in autumn and winter.Suitable season: autumn, winterApplicable age: adultApplicability Gender: Neutral/Both Men and WomenFabric Composition: Polyester Fiber (Polyester)Filler: silk flossNeck type: V-shapedApplicable Scene: Ice and Snow Sports, Fishing SportsColour: BlackSize: S,M, L, XL, XXL, XXXL,XXXXLGear Mode: Three Gears AdjustmentPlug-in mode: USB socketPower supply: 5V/2A mobile power supply (excluding power supply)Packaging: heated waistcoat*1