Comfy and versatile, the M12 Gray Heated Hoodie Kit, Medium (2369-M) uses advanced technology to warm the body, making it the perfect piece of clothing to wear in cold conditions. This durable cotton hoodie boasts a waffle weave thermal lining that provides three-season layering on and off the jobsite. Its carbon fiber heating elements provide adjustable heat to core body areas. There's no need to wear bulky undergarments when you've got this hoodie: it generates and holds heat close to the body, keeping you toasty in chilly weather. Plus, it can run up to 6 hours on the M12 REDLITHIUM compact battery.