Not your common rain jacket. The Montane Atomic Stretch Rain Jacket stretches like a soft shell and still gives you waterproof breathable protection from the elements. Constructed of waterproof, windproof and extra-durable PERTEX® Shield, the Montane Atomic Stretch Rain Jacket will be your new best friend on ultralight backpacking trips. Weighs 11.1 ounces. Avaialble in an Active Mountain fit.