Mobile Warming Ansai Silverpeak Battery Heated Ski Jacket The Windshark 4-way stretch high breathable, waterproof fabric provides additional flexibility needed in active outdoor sports Features three heating panels lined with steel alloy fiber elements Includes (1) one 7.4V 2.2Ah Rechargeable Lithium-ion Battery Includes (1) Single Portable Battery Charger Battery provides up to 10 hours of Heat