Jack Wolfskin Passamani Down Jacket Properties: The technical, minimalist Passamani Down jacket is perfect for warm, flexible layering. This jacket focuses on environmental protection, using a water-repellent and windproof PERTEX QUANTUM outer fabric made from recycled polyamide. It is filled with certified, high-loft HYPERDRY down, which has a durable water-repellent finish and retains its insulating properties when wet. When not in use, the jacket can be easily packed into its own pocket. The high collar provides protection from the cold, and all your important items can be stowed in three pockets.