If you want the warmth of an Atom Hoody with a wider range of motion and smaller footprint, you&';re in the right place. Pull on the Atom Vest when you feel the temperature dropping on longer hikes and climbs or wear it as a midlayer under a shell for touring and wet winter objectives. The Coreloft synthetic insulation stays warm even if you run into light weather, making it a better alternative to down for high-output days year round. What&';s been updated: Updated with a new FC0 material; the side panels and lining are now made with a recycled material as well. A new regular fit, with a slightly lower collar, makes layering easier.