The Arc'teryx Atom SL Jacket is designed for mid-output mountain pursuits where weight and breathability are paramount. At the heart of this minimalist layer is ultra-breathable, 100% recycled Coreloft™ synthetic insulation, strategically mapped to the torso to provide essential warmth to your core without the bulk. The exterior features a durable Fortius™ Air 20 stretch nylon face fabric, balancing wind resistance with high airflow. Designed for hikers but championed by trail runners and alpine guides, the Atom SL utilizes uninsulated sleeves and Octa® Fleece side panels to ensure you never overheat during high-intensity efforts. It is a sustainable choice for your kit, featuring Bluesign® approved materials and recycled content throughout its versatile construction. Focusing on high-performance utility, the features of the Atom SL Jacket are refined for the fast-and-light enthusiast. The uninsulated sleeves significantly reduce the overall weight to a mere 255g, while simultaneously enhancing arm mobility and making the jacket incredibly easy to pack into a small corner of your rucksack. For a tailored fit, the dual hem cinches allow you to seal out cold drafts or adjust the length to sit comfortably under a climbing harness or hip belt. The integrated stretch side panels not only boost ventilation during uphill grinds but also facilitate effortless overhead movements. Whether used as a standalone piece on cool summer evenings or a breathable mid-layer during winter runs, this jacket offers targeted protection and unrestricted freedom. Arc'teryx Atom SL Jacket Features Durable, lightweight Fortius™ Air 20 stretch nylon plain-weave face fabric Ultra-breathable, 100% recycled stretch Coreloft™ synthetic insulation Lightweight stretch Octa® Fleece side panels Uninsulated sleeves for reduced weight, extra arm mobility, and easy packability Dual hem cinches seal out drafts Bluesign Approved Material Reinforced hems with adjusters Fit: Fitted Center Back length: 70cm Weight: 255g
