This 12-ounce 100% cotton duck coverall is lined in our warmest arctic-weight quilted nylon polyester insulation. It features a variety of utility and tool pockets as well as a hammer loop. Two-way leg zippers open to the waist and are covered with protective wind flaps that snap closed. Other features include a split back with bi-swing for ease of movement and rib-knit storm cuffs to keep the cold out. Main seams are triple-stitched and there are double knees with cleanout bottoms -- just to make a tough coverall that much tougher and long-wearing.For over 115 years, Carhartt has manufactured premium workwear known for exceptional durability, comfort, quality of construction, and fit that you can feel in the fabrics and see in the performance.