Port Authority Down Jacket. J323For lofty, protective warmth you just can't beat genuine down. Our Down Jacket is a superb weather-fighter on its own--or it can be worn under the Heavyweight Parka (J799 and J799S, sold separately) for double the protection., 100% nylon shell and lining, 600 fill power down insulation, Elastic binding at cuffs and hem, Open pockets, Open hem, Includes a separate polyester pouch to pack jacket into