Packable by compressing into itself and packed with performance-focused details, the Arc'teryx Men's Atom Jacket uses stretch fleece for lightweight warmth in all winter conditions. Constructed with Coreloft™ Compact 60 insulation and lined with durable ripstop, this versatile midlayer makes the most out of its terrain. With an articulated design the enhances comfort and mobility, the air-permeable Tyono™ 20 keeps this hoody light and ready to ride.