The Mammut Men's Eigerjoch Advanced IN Hooded Jacket is an insulated jacket for mountaineering. Built for adventure, this hybrid insulation piece is ready to take on a range of cold weather and the elements. Featuring hyperDRY, water-repellant, 850 fill power down through the majority of the jacket, with PrimaLoft Gold synthetic insulation at the moisture-prone areas of shoulders, hood, back and underarms. Warm, lightweight and packable, you'll be pushing to the top without having to worry about the cold. The Pertex Quantum shell fabric helps maintain the light weight, while providing abrasion resistance against packs and other gear.