Features: This is a intelligence vest for you. With mobile power storge pocket, easy travel. 1 minutes fast heat, dispel cold and keep you warm. Set the temperature you want to respond to a variety of environments. A button to heating, three stall temperature control, intelligent heating. It can be washed by machine and can be washed by hand. Do not wring it by hand. General USB interface power supply, longer service life,anti water splashing and washable. The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out. Specifications: Style: Sleeveless Vest Material: Polyester Color: Black.