Powered by M12 REDLITHIUM Battery Technology, the Milwaukee M12 12V Lithium-Ion Heated Hoodie uses carbon fiber heating elements to create and distribute heat to the chest and back. Combining a durable cotton/polyester exterior with a waffle weave thermal lining, the hoodie provides a versatile three-season solution to keep heat in and allow users to shed bulky layers. This kit comes with one heated hoodie, an M12 battery and charger.