A tough 100% cotton duck overall in a 12-ounce weight. There are double-knees with cleanout bottoms to accommodate knee pads. Leg zippers go all the way to the thigh for easy on and off. Both legs have hammer loops and ruler pockets. An extra wide zippered chest pocket provides extra convenience. There are deep, large front pockets and reinforced back pockets. Everything about this overall is designed to be tough, convenient, and comfortable.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.