This is the must-have item of the winter season for use on and off the jobsite. The M12 Cordless Heated Jacket uses the latest lithium battery technology to provide continuous heat for up to six hours on a single battery charge. The jacket uses three sewn-in carbon fiber heating zones placed in key areas to warm the user’s core. The heating element can be set to high, medium, or low at the touch of a button found on the lapel. Milwaukee Electric Tool Corp. 800-729-3878.