From website: Description Warmth Rating Earned: Level 1 - Warm Engineered For Low Warmth in Cooler Conditions. See Technology section below for more details. The Carhartt Detroit Jacket built a reputation for toughness on the backs of warehouse workers, farmhands, and ranchers across America. This men's jacket is made of cotton duck that's rugged and durable. It has a warm blanket lining down the body with smooth quilted nylon through the sleeves. The droptail hem provides extra coverage but leaves enough room for your tool belt. Features 12-ounce, 100% ringspun cotton duck Blanket-lined body for warmth; Quilted nylon sleeve lining for warmth and easy on-and-off Filling: 100% polyester Carhartt-strong, triple-stitched main seams Pleated bi-swing back for extra stretch across the shoulders Snap-adjustable cuffs Left chest pocket with zipper closure Two lower front pockets Two inside pockets Back Length: Large Regular: 27.5"; Large Tall: 29.5" Model height: 6'2"; Chest size: 40.5"; Wearing size M