The ActionHeat Men's 5V Battery Heated Work Jacket is built tough for warmth and durability on or off the job. Designed with a rugged canvas exterior and reinforced rib-knit cuffs and waist, it keeps out cold air while providing superior comfort. The jacket features three built-in heating panels that target the chest and upper back to maintain core warmth. It includes a powerful 5V 6000mAh Power Bank that not only powers the heating system but can also charge your phone or other USB devices. With three adjustable heat settings controlled by a one-touch LED button, this work jacket ensures all-day warmth and performance in any environment.