The MILWAUKEE M12 AXIS Heated Vests are designed to protect from the cold and weather on the jobsite. Powered by M12 REDLITHIUM Battery Technology, these heated vest kits use carbon fiber heating elements to create and distribute heat to the chest, back and shoulders. A single touch LED controller heats up the battery heated vest to three heat settings. These vests are built with M12 AXIS Ripstop Polyester providing a lightweight, compressible design that can be used as an outer shell or a mid-layer vest, and protecting from wind and water. Product includes an M12™ Power Source.