8-ounce 98% cotton/2% spandex canvas - Rugged Flex durable stretch technology for ease of movement - Double-layer knees with openings for adding knee pads and cleaning out debris - Adjustable front-elastic suspenders - Bib pocket with zipper closure - Two additional storage pockets; one with pen stall - Zipper fly - Two large lower-front ledge pockets - Right-leg hammer loop - Right-leg secure cellphone pocket - Long-wearing chap-style double-front construction with cleanout bottoms that can accommodate knee pads - Two reinforced back pockets - Full circumference kick-panel - Triple-stitched main seams - Metal rivets at vital stress points