What Our Gearhead(R) Experts Are Saying:"This jacket hits the sweet spot for lightweight warmth. The 900-fill down packs super small, and the Pertex shell has held up well against rough granite and icy brushes. I stash this on every alpine trip-it's perfect for belays, transitions, or just staying warm without bulk."We rely on the Eiger Nordwand Light Down IN Hooded Jacket when temperatures drop at high altitudes and every ounce counts. Part of Mammut's elite Eiger Extreme collection, this piece delivers serious warmth without slowing us down, making it a staple for alpine missions where space and weight are precious. Its responsibly sourced 900-fill-power down insulation is protected by a Pertex(R) Diamond Fuse shell-engineered for abrasion resistance, weather protection, and long-term durability. Whether we're on a technical ice route or setting up a bivy, the warmth-to-weight ratio is impressive, and the compressibility makes it easy to stash until the cold hits. Designed with alpine efficiency in mind, it features two harness-compatible front pockets, a helmet-friendly hood, and repairable zipper tech for long-term mountain use.