R41 - M Quilt Lined Zip To Thigh Bib Overalls Carhartt's duck zip-to-thigh bib overall is quilt-lined to keep you warm on the job site. Made of 12-ounce, 100% ring-spun cotton duck, it has a 100% nylon quilted polyester lining to waist and features ankle-to-thigh leg zippers with protective wind flaps. The chap-style double-front has cleanout bottoms that can accommodate knee pads and back-leg Cordura® kick panels add extra durability. *Field-Tested *12-ounce cotton duck, heavyweight *Quilt-lined *Double-front