Powered by the M12 REDLITHIUM battery. Each heated hoodie uses carbon fiber heating elements to create and distribute heat to the chest and back. A single touch LED controller heats up the battery heated hoodie to three heat settings. This MILWAUKEE heated hoodie kit has a new Quick-Heat function that allows you to feel heat three times faster than our previous hoodies and market competitors. The hoodies are built with a durable cotton/polyester exterior and waffle weave thermal lining. This provides a versatile three-season solution to keep heat trapped in without bulky additional layers. This kit comes with one heated hoodie, an M12 battery and charger.