Lightweight Men's Heated Vest Rechargeable Three heated levels can be selected only by pressing a button on the left chest of the heated clothing(Red high, White medium, Blue low). You can adjust different heated levels according to variable weather and different environments, perfect for outdoor activities like camping, hiking, skiing, fishing, motorcycle, mountain Men's heated vest has built-in 4 carbon fiber heating elements, distributed in the collar, middle back and under the two pockets to keep the core body warm. Even in extremely cold weather, you can quickly enjoy the comfort brought by warmth. Always Happy to send more measurements 😊