NEW never worn! Experience top-tier performance with this Arc'teryx jacket. The Arc’teryx Atom SL is an ultra-lightweight, minimalist jacket built for high-output activities in cool conditions. Designed for versatility, it’s perfect as a standalone layer in mild weather or a midlayer under a shell when the temperature drops. Durable and sleek. Whether you’re hiking, climbing, or traveling light, the Atom SL Hoody is your go-to for dynamic movement and adaptable performance.