Mobile Warming Classic Mens Gun Metal Softshell Textile Motorcycle Vest - X-Large Windshark four-way stretch high breathable, waterproof fabric Three heating panels lined with steel alloy fiber elements Optimum placement with two panels on the chest and one on the back Includes one 7.4V 2.2Ah rechargeable lithium-ion battery and charger Battery features built-in four-level thermoregulating controls