The Rab Women's Firewall Mountain Jacket is a lightweight rain jacket that you can pack on backpacking and mountaineering trips with inclement forecasts. Its Pertex Shield 3L construction includes remarkably high waterproof and breathability ratings, and the 100% recycled material is thin and packable for stashing away when it's sunny out. A regular fit enables easy layering at a moment's notice, and Rab articulated the sleeves for freedom of movement. Adjustments along the hood, hem, and cuffs secure coverage from storms, and YKK Aquaguard zippers add watertight coverage to the front closure, ventilators, and pockets.