-Washed bib overall with adjustable shoulder straps -Bib pocket with snap closure, double knees with cleanout bottoms and utility pockets -Triple stitched main seams -Zipper fly The first bib overalls Carhartt ever created were designed to keep railroad workers comfortable on the job. These kids' bibs honor the original look. Made of durable cotton duck with a broken-in feel, they're reinforced with a double layer at the knees to keep up with afternoons spent climbing trees and sitting in the grass.