[Four heating zones] The heating vest has four heating zones, including the front chest x2, the upper back x1 and the collar x1. You need to bring your own power bank. [Three layers of heating] Just press a button on the left chest of the heating vest to select three heating levels (high, medium, and low settings: from 40C to 60C). You can adjust different heating levels according to the weather and environment. Very suitable for outdoor activities, such as winter running, snowmobiles, motorcycles, mountains, camping, hiking, skiing, fishing, hunting or office daily work and business. [Machine washable] The heated jacket and vest are machine washable and can be easily maintained and worn for daily wear. Perform up to 50 washing tests in a washing machine and still remain intact. Please use this item conveniently, and wash this mens heating vest in a laundry bag.Size: M---bust 120cm, shoulder width 50cmL--bust 124cm, shoulder width 51.5cmXL---bust 128cm, shoulder width 53cmNote:Package does not include rechargeable battery