TechNiche's Air Activated Heating Vests with HEAT PAX body warmers delivers a total of 16 hours of warmth.

They are an effective defense against the cold. Heating can be suspended at any time by resealing the inserts in an airtight container or plastic bag.

•High collar, handy front pockets, and zipper closure; deliver additional coverage and protection where you may need it most
•Soft, durable, 100% poly-fleece shell w/black cotton-poly elastic trim, and a total of eight (8) built-in Body Warmer pockets four (4) front, and four (4) back for all around body comfort
•Include eight (8) HEAT PAXTM Body Warmers (5540) that deliver steady, comfortable heat to your torso for up to 20 hours

Available in three colors: Royal Blue(shown), Black, and Sandstone.
Available in sizes small to 3XL.