Heating vest is the only vest on the market with a heating system for the hat. It has 5 carbon fiber heating zones: (2 hats + 2 abdomen + 1 back), equipped with a brand new 5 volt battery. Our time-tested use of waterproof nylon shell, caps are made of Lycra fabric, can be hand-washed or machine-washed. It is very fashionable and can be worn alone in daily use, but it is light and fully compressible, and it can also be worn as the base layer of your favorite rain and snow heating vest. You can quickly switch between 3 gears and adjust your personal calorie level according to your preferences. When the weather gets cold, the heating vest provides instant heat, allowing you to stay outdoors and enjoy your favorite activities.