Powered by M12™ REDLITHIUM™ battery technology, the Milwaukee® M12™ heated vest uses carbon fiber heating elements to create and distribute heat to the chest and back. Wind and water resistance combined with a thermal fleece lining provide protection from the elements and allow for 3-season versatility. Reinforced with GridIron™ 900 denier ripstop polyester to outlast 12 oz cotton duck work wear by 3X against abrasion and tear, the vest also features riveted, reinforced pockets and a tarnish resistant metal zipper to survive the jobsite.