12-ounce 99% cotton / 1% spandex duck - Relaxed Fit - Built to move with Rugged Flex stretch technology - Sits at the waist - Comfortable fit through the seat and thigh - Straight leg opening - Double-layer knees with openings for adding knee pads and cleaning out debris - Strong sewn-on-seam belt loops - Front pockets - Heavy-hauling reinforced lined back pockets - Multiple tool pockets - Number of belt loops varies based on size -