Our M12™ TOUGHSHELL™ Heated Vest, powered by 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. Our 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 our users the versatility and comfort needed depending on the situation. With warm insulation and DWR-coated material, this vest provides our users with a wind and water-resistant solution that can be used as an outer shell or mid-layer.