The MILWAUKEE M12 TOUGHSHELL Heated Vest, powered by MILWAUKEE M12 REDLITHIUM Battery Technology and featuring an advanced heat technology system, combines lightweight and durable carbon fiber heating elements, Quick-Heat functionality, enhanced fabric construction, and optimized interior liner to deliver HEAT BUILT TO OUTLAST. This new generation TOUGHSHELL Stretch Polyester has been re-engineered to stretch and move as you work while being as tough as previous TOUGHSHELL fabric. This MILWAUKEE heated vest has a battery pocket pass-thru design that is easy to use with front or back pocket battery placement, allowing users the versatility and comfort needed depending on the situation. With warm insulation and DWR-coated material, this vest provides users with a wind and water-resistant solution that can be used as an outer shell or mid-layer.