Carhartt Duck Active Jacket Unused, Made in Mexico Black Size L Outer: 100% Cotton Lining (Body): 100% Polyester Lining (Sleeves): 100% Nylon Insulation: Polyester This is a classic Carhartt active jacket made with 12-ounce heavyweight cotton duck fabric. It has four pockets and a hood with a drawcord for a functional design. It uses 3M Thinsulate insulation, which is lightweight and warm, so it should keep you warm even in the dead of winter.