ideal for backcountry layering and warmth in the city. with its cosy upcycled 750-fill down and water-repellent recycled shell, the re-up down puffy jacket is a workhorse built with cutting-edge eco-friendly materials. wear it under a shell jacket on cool winter days or slip into it on the summit. the re-up down puffy is on jeremy jones' back or in his backpack every time he leaves the trailhead.