Description: The power bank supply must be prepared by yourself. With power bank pocket design, it is convenient for you to carry the power bank. Adopting USB heating, it doesn't produce harmful radiation. With three-level temperature control, it can be intelligent heating, you can adjust suitable temperature. The energy saving level is 40 degrees, comfortable level is 50 degrees, warm level is 60 degrees. Made from nylon material, this heating waistcoat is wear resistant and durable. There are four sizes for you to choose, including S, M, L, XL. It is suitable for men or women to wear in cold weather during outdoor activities. Item Name: Heated Vest Material: Nylon/Nylon Style: Fashion Gender: Unisex Size Type: Regular Season: Autumn, Winter Collar Type: V-neck Sleeve Length: Sleeveless 3 Heating Levels: 40/50/60 Degrees Celsius Power Type: USB Charging (Cable Not Included) Power Supply: Power Bank (Not Included) Features: Thick, Warm, USB Heated Size Details: Size: S-M, Length: 40cm/15.7 inch, Suggested Weight: 35-65kg/77-143lb, Suggested Height: 1.5-1.75m/4.9-5.7ft (Approx.) Size: L-XL, Length: 46cm/18.1 inch, Suggested Weight: 65-95kg /143-209lb, Suggested Height: 1.75-1.9m/-5.7-6.2ft (Approx.) Notes: Please refer to our size chart and choose the right size. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Package Includes: 1 x Heated Vest