Carhartt R33 Extremes Zip to Waist Biberall with Carhartt's Arctic Quilt Lining. 1000 denier Cordura nylon. Water repellent. Nylon lining quilted to arctic weigh polyester insulation. Double knees for added durability with cleanout bottoms that can accommodate knee pads. Ankle to hip leg zippers with protective wind flaps and snap closures. Bar tacks at vital stress points.