"We set out to make the best outdoorsy rain jacket, and I think we nailed it. It's breathable, easy to stash, and totally waterproof." —Gearhead® Expert AlexBuilt with input from our Gearheads, the Backcountry Runoff 2. 5L Rain Jacket does the three most important things we ask of our rain shells. It keeps us dry with a waterproof Pertex membrane, DWR-treated face fabric, and fully sealed seams. It also keeps us from overheating with high levels of breathability and the added ventilation in the shell's front, back, and sides. Finally, the jacket packs down easily into its chest pocket, which converts into a convenient carrying pouch we can stuff neatly into our backpack when the sun comes out.