For lofty protective warmth you just cant beat genuine down. Our wind-resistant water-resistant 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