Powered by M12â"¢ REDLITHIUMâ"¢ battery technology, Milwaukee M12â"¢ heated jackets use carbon fiber heating elements to create and distribute heat to the chest, back, and front hand pockets. For use in abrasive environments, ToughShellâ"¢ stretch polyester delivers 5X longer life than previous soft shell jackets, and provides wind and water resistance to survive the elements.MILWAUKEE