Built to weather the cold, Carhartt's sandstone waist overall features a 100% nylon lining quilted to midweight polyester insulation. The overall is made of 12-ounce, 100% cotton sandstone duck, sits slightly below the natural waist, and is cut with a full seat and thigh. Chap style double-front panels add durability, and the double knees have cleanout bottoms to accommodate knee pads. There are Cordura® kick panels at the leg openings, reinforced back pockets, and triple-stitched main seams.