Specification:Color: Black, GreySize: S, M, L, XL, 2XL, 3XL, 4XL, 5XL, 6XLSeason: WinterSleeve: VestFit Style: SlimCollar: V NeckPattern: SolidClosure Type: ZipperMaterial: Polyester, NylonHeating area: 9 HeatingOccasion: CasualWhat you get:1Pack Heating Vest(Not Include Power Bank)Waterproof, anti-wind, warm, breathable, wear-resistant, ultra-light, anti-static.Charging precautions: 5V non-inductive voltage (use your charging treasure to charge better heat effect), no electromagnetic radiation, energy saving and environmental protection,Connect the charging treasure, press and hold the switch for 3 seconds to charge and heat.NOTE:1. Please remove the power bank before washing.2. Make sure put heated vest into laundry bag before putting into washing machine, otherwise washing machine will break the wire line.3. Wash it gently by hand.4. Battery not included, kindly use your own USB powerbank.5. Note: This vest is available in nine sizes, such as S, M, L, XL, 2XL, 3XL, 4XL, 5XL, 6XL. Kindly check our size chart and measure the proper size.