Rugged flex double front and cleanout openings. These jeans stretch to help you move easily in the right places. 15 oz., 85% cotton/14% polyester/1% spandex denim. 15 oz., 85% cotton/14% polyester/1% spandex denim Rugged flex durable stretch technology for ease of movement. Sits slightly below the waist. Relaxed seat and thigh. Double front With cleanout openings that accommodate knee pads Multiple tool and utility pockets. Carhartt.