The Arc'teryx® Atom SL Hoodie delivers hydrophobic mid-layer insulation and water-resistant tech in a lightweight, ultra-stretch package. Coreloft™ Compact insulation with hydrophobic Fortius™ Air 20 face fabric balances air permeability, weather resistance, and packable warmth. Octa® fleece side panels open up ventilation and freedom of movement for every trail. It features an adjustable StormHood™ with a water-resistant laminated brim and drawcord, anatomical mapping with gussets, and long sleeves. A zippered front closure with No Slip Zip™, inner draft flap, zipper garage, and adjustable hem drawcord provides secure, customizable coverage.