Jacket from Arc'teryx. Atom Jacket M is a lightweight and versatile insulated jacket with a fitted silhouette. It is made from durable Tyono™ 20 with FC0 DWR and features Coreloft™ Compact 60 insulation that retains warmth even in damp conditions. Stretch side panels provide ventilation and freedom of movement, and the jacket is equipped with an adjustable hem, two hand pockets with hidden zippers, and an internal zippered pocket.