Carhartt's duck zip-to-thigh bib overall is unlined to span the seasons, made of 12-ounce, firm-hand, 100 percent cotton duck, it features ankle-to-thigh leg zippers for easy on/off, it also has chap-style double front with cleanout bottoms that can accommodate knee pads, right and left hammer loops, and front elastic suspenders, back pockets are reinforced for durability