The Arc’teryx Men's Nuclei Hoody offers packable warmth for fast and light alpine pursuits. The outer is made of Arato 10 ripstop nylon which is windproof and durable, while Coreloft synthetic insulation provides effective warmth – even if wet. This combination creates a hoody that is light, resilient, and delivers outstanding thermal performance for remarkably little weight, ideal for the static phases of alpine travel. The helmet compatible StormHood provides full coverage without impacting your vision and has a soft hood brim and an adjustable drawcord to ensure a perfect stay-put fit. The adjustable hem sits with a low profile for comfort and compatibility with a harness. Articulated patterning ensures unrestricted mobility and gusseted underarms mean you can use your arms overhead freely, without lifting the hem. It stuffs easily into the included stow sack.