12 oz. (US), 20 oz./L yd (CA), super-duty cotton duck; Generously sized for maximum comfort; Triple-needle stitched seams; Adjustable elasticized bib straps; Covered knee-length zipper; Brass pocket and fly zipper; Side utility pockets; Brass rivets at front stress points; Reinforced knees; Manufactured in a LEED (Leadership in Energy and Environmental Design) certified factory;