Men's, Mid-weight, 2-Way Stretch, Durable Denim. . . . Our most durable, abrasion-resistant denim yet: but we didn't forget the stretch. Go ahead, wear 'em 14 hours a day, 7 days a week. . . . 12-ounce, 85% cotton/14% polyester/1% spandex denim. . Built to move with Rugged Flex