"The Arc’teryx Atom Jacket is a reliable layer for versatile, high-activity days. Wear it on its own for cool forest hikes, windy summits, climbing trips, or around the campfire, or as a midlayer for winter tours and wet weather. Coreloft synthetic insulation keeps you warm even in damp conditions, making it a better alternative to down for high-performance activities year-round. A technical essential that effortlessly combines comfort, protection, and freedom of movement.

- Side panels made of high-performance stretch fleece provide ventilation
- The durable Coreloft Compact 60 insulation is breathable, warm, and lightweight