The Rab Men's Mythic Alpine Down Jacket is stuffed with some of the lightest, loftiest, and most weather protective down insulation worthy of alpine climbing and mountaineering. Rab finished the 900-fill-down insulation with Nikwax to retain its lofty warmth in wet weather. The 100% recycled Pertex Quantum shell is reliably windproof on windy ridgelines, and a fluorocarbon-free DWR treatment adds water-resistant weather protection, too. Layer this slim-fitting full-zip over your baselayers with ease, and articulated sleeves ensure full mobility up and down the mountain.