Performing as midlayer and standalone across a broad range of activities and output levels, the iconic Atom LT is an Arc˜teryx mainstay. Over time, we have refined the design to elevate performance, improve durability and extend its versatility. Its 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.

• ATOM Versatile synthetic insulated mid layers with a high degree of weather resistance
• LIGHTWEIGHT High performance, minimalist design that is durable for its weight
• ESSENTIALS Versatile high performance designs for diverse activities and conditions
• SYNTHETIC INSULATION Man-made insulation with quick dry times, durability and retains warmth when damp.