The Arc'teryx Norvan Insulated Hoody uses Fortius™ Air 20 face fabric for a balance of air permeability, weather resistance, and lightweight durability. It features 25 g/m2 Coreloft™ synthetic insulation on the front, sides, and sleeves for warmth with minimal bulk. Uninsulated underarm gussets and back panel enhance ventilation. The hoody includes a low-profile hood that rolls into the collar, a side pocket with an invisible zipper that doubles as a stuff sack, and integrated flip-mittens in the sleeves. Reflective elements increase visibility in low light.