Arc'teryx Atom Vest Men's in the colour Mongoose is a lightweight and versatile insulated vest for men, designed for hiking, climbing and other activities where warmth, breathability and freedom of movement matter. It works well as an extra insulating layer when temperatures drop, or as a mid-layer beneath a shell jacket in cold and wet conditions.

The synthetic Coreloft™ insulation provides effective warmth while performing well in damp conditions. The Fortius™ Air 20 nylon outer fabric is lightweight and breathable and contains recycled material. A PFAS-free FC0 DWR treatment makes the surface water-repellent and helps keep light moisture at bay.

Along the sides, lightweight stretch Octa® fleece panels provide additional ventilation and a high degree of freedom of movement. The ergonomic construction follows the body's movements and keeps the vest comfortable during high-intensity activities.

Two hand pockets with concealed zips offer practical storage, while an adjustable drawcord at the hem allows you to seal out cold draughts. The low weight and packable construction make the vest easy to carry in a pack as a flexible insulating layer throughout the year.