The Rab Neutrino Endurance Jacket for Men is your best companion this season for those mountaineering and lightweight ascents in alpine winter conditions. If you're in the market for a warm, functional, and highly packable jacket, the Neutrino Endurance Jacket has the advanced Pertex fabrics that are breathable, water-resistant, and windproof for long days out in cold, wet weather. Featuring high quality, hydrophobic 800 fill power European goose down, the Neutrino Endurance also uses stitch-through baffle construction to eliminate cold spots, and the helmet-compatible hood is also down filled with a flexible polymer peak for protection and functionality and easily rolls down for velcro-free storage. YKK Vislon AquaGuard zippers are used throughout to reduce weight and offer weatherproof options, and the internal insulated zipper baffle has a chin guard for your protection and comfort. Two zippered hand pockets and an internal zippered pocket give you options for storing small essentials. An anti-snag velcro cuff and hem drawcord let you customize your fit, and the Neutrino Endurance comes with a separate stuff sack for easy packing and storage in your pack.