Carhartt has been making bib overalls since day one. The original unlined bib overall is now what Carhartt calls the R01. Since then, the line has expanded to include a variety of unlined and insulated bib overalls. Carhartt also produces an Extreme line of bib overalls for workers that require protection from refrigerated work environments and frigid below-zero temperatures. Browse our selection of Carhartt Bibs below.