"What Our Gearhead® Experts Are Saying:""I've been using the Eiger Nordwand IN Flex Air Hooded Jacket for everything from ice climbing to fast-and-light ski tours. The Polartec Alpha Direct insulation breathes incredibly well, and the Pertex outer lets me move freely without overheating. It’s become my go-to midlayer for big missions.""When we’re pushing high into the alpine—where temperatures drop, wind cuts sharp, and sweat is unavoidable—we trust the Eiger Nordwand IN Flex Air Hooded Jacket. Part of Mammut’s elite Eiger Extreme collection, this jacket balances lightweight insulation with high-output breathability for serious mountain athletes who move fast and demand performance. At its core is Polartec® Alpha® Direct insulation, which delivers reliable warmth while remaining open and breathable, so moisture escapes even during full-throttle climbs. The outer fabric—Pertex® Quantum Air—adds wind resistance and mobility with a durable, stretchy weave that’s built for vertical movement. From skintracks to summit ridgelines, this layer is designed for fast transitions, harsh exposure, and efficient performance."

Key Specifications