When you need durable workwear that's as rugged and handy as you are, you can trust the Carhartt(R) Men's Sandstone Duck Bib Overalls to get the job done. . . . 100% sandstone duck. . Lined with midweight, 100% quilted nylon polyester. . Double knees. . Cleanout bottoms accommodate knee pads. . Zip-to-knee leg openings. . Protective wind flap. . Several tool and utility pockets. . Hammer and brush loops. . Back pockets are reinforced for durability. . Weight: 12 oz. . .