Light, packable and proven, the Atom LT – an Arc’teryx icon – is a performance warming layer for backcountry adventures, alpine ascents and downtown commutes. Refined for its next generation, we elevated its performance and extended its versatility. 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.

Redesign includes an update to the cuff construction for easier on/off and layering, an updated material package for enhanced durability, updated fit, and a dope dyed liner.