Carhartt Infant Boys' Canvas Bib Overalls Brown NWT Size 9 Months The first bib overalls Carhartt ever created were designed to keep railroad workers comfortable on the job. These Carhartt Infants' Canvas Bib Overalls pass on the classic style to the youngest in your pack. These bib overalls have the same look as the original but with a canvas build that feels soft and broken-in. Made of 9-ounce, 100% cotton canvas for a soft, broken-in feel Adjustable shoulder straps offer a custom fit Bib overalls with a mock fly Double knee for durability Pocket on the bib with a Carhartt patch Leg snaps