The Arc'teryx Atom Jacket is engineered for versatile insulation and exceptional comfort during high-output activities in cold weather. It features Coreloft synthetic insulation that retains warmth even when wet, combined with breathable side panels that optimize ventilation and mobility. The durable water-repellent finish offers light protection against the elements, making it suitable as a mid-layer or standalone jacket. Its ergonomic design and articulated construction deliver a precise fit that supports dynamic movement in alpine and outdoor environments.