Carhartt R38 Duck Zip-to-Waist Biberall with Carhartt's Quilt Lining. 12 ounce, firm hand 100% ring spun cotton duck. 100% nylon quilted to Carhartt's midweight polyester lining. Right and left hammer loops and ruler pockets. Zipper front with wind flaps and snap closures at top of bib and waistband. Ankle-to-hip leg zippers with protective wind flaps and snap closures. Carhartt's famous triple stitched main seams. Double knees with cleanout bottoms that can accomodate knee pads.