Patagonia Bivy Down Parka Forge Grey The mens Bivy Down Mountain Parka from Patagonia is a quilted DWR Coated nylon canvas hooded jacket that is insulated with fully traceable 600 fill power down. It features two insulated handwarmer pockets, zipper closing, internal zip pocket, adjustable hood & a snapped placket.DWR technology (durable water repellent) fabric finish repels light rain & snow & and decreases drying time which means you can spend more time being warm. The Forge Grey colour way looks great & the jacket performs superbly, what more could you ask for? DWR coated nylon shell 600 fill down insulation Handwarmerpockets Adjustable hood Description by Adam.