Performing as midlayer and standalone across a broad range of activities and output levels, the iconic Atom is an Arcteryx mainstay. Previously known as the Atom LT, the design has been revised to elevate performance, improve durability and extend its versatility.

Coreloft™ Compact insulation retains heat when wet and withstands repeated packing and unpacking. Light, soft and durable, the Tyono™ 20 face fabric resists wind and weather, and stretch fleece side panels improve ventilation and freedom of movement.

Updated with a revised fit.