The Rab Women's Downpour Mountain Jacket is a rain shell designed for extreme hikes in extreme weather. Its Pertex Shield 2.5L fabric offers high waterproof, breathability ratings bonded to a thin, light, 100% recycled material for compact packability as well as dependable weather protection. A regular fit enables quick-and-easy layering in the middle of the trail, and fully articulated sleeves ensure freedom of movement. There are underarm ventilation zippers, and all external zippers feature YKK Aquaguard zips for watertight protection. The A-line pockets are accessible when you're wearing a big backpack.