展开The Arc'teryx Atom LT Hoodie is super light, breathable, and warm. It's not hard to see why the Atom remains one of the best-selling and highest rated midlayers year after year, beloved by skiers, hikers, climbers, and townsfolk alike. It's great on its own for a bit of warmth when the weather's not too bad, and the air permeable Tyono shell and Coreloft insulation really shine when used to add warmth under a shell without putting a stop to airflow or breathability.