100 % Cotton. 10 ounce rigid denim, cross over high-back style. Large bib front pocket, pencil division, watch pocket, hammer-loop, too. Double tool pocket, triple stitched seams. Zipper fly. Sizes 30 to 50″ waists, 30 to 34″ inseam lengths. Customers say order 2″ larger waist size for comfort. Limited stock.