The Firstgear Heated Puffer Vest is made from lightweight nylon materials which allow it to be worn underneath your motorcycle jacket or on its own. With 3 heating levels Firstgear ensures you will stay nice and toasty. The built in chest controller makes it easy to change your heat level as well as easy to find while you focus on the road. Use with a compatible Li-ion battery using the USB input connector for portability.; High collar Lightweight thermal padding Battery pouch Hand pockets High, medium and low heat settings Chest Controller Works with Any USB Connected Li-Ion Battery (Minimum Suggested size: 10,000 mAh) Battery not included Two-year warranty