Light, packable and proven, the Arc’teryx icon Atom LT Jacket is a performance warming layer for backcountry adventures, alpine ascents and downtown commutes. The Coreloft Compact 60 insulation retains heat when wet and withstands repeated packing and unpacking. The soft, durable Tyono 20 face fabric resists wind and weather, and stretch fleece side panels improve ventilation and freedom of movement.