Warm And Breathable, Wind And Weather Resistant, Packable And Durable. Worn As A Cold Weather Midlayer Or Standalone During Rest Phases, The Atom Ar Hoody Is One Of Our Most Versatile Insulation Pieces. Its Coreloft™ Synthetic Insulation Is Efficient, Effective And Resilient. The Light, Wind Resistant And Water Repellent Tyono™ 30 Shell Is Treated For Extra Durability, And Permeair™ Panels Under The Arms Improve Ventilation. The Insulated Helmet Compatible Hood Adds Warmth And Protection.