Rugged, heavy-duty 15-ounce 100% cotton denim. It doesn't get any tougher! This is a jean that's made to last and last and last. Designed for a slimmer fit through the seat and thigh. With a waist at the natural waistline, a tapered 15 3/4-inch leg opening, and reinforced back pockets. A good look on the job or off. This jean has been fabric tested to assure wear-resistance in all key areas. When it comes to a long-wearing, great looking jean, it doesn't come any better than Carhartt.