The Arc’teryx Atom AR Hoody (now often labeled as the Atom Heavyweight) is a top-tier synthetic insulated jacket known for being a warm, breathable, and versatile "all-round" piece for cold weather. It features varying insulation weights for warmth where needed, a highly wind-resistant face fabric, and is durable enough to act as a standalone jacket for skiing, climbing, or casual, daily use. Adjustable sides. Zipper pockets. Feels like a soft sleeping bag! Zipper front. Non smoking home Questions? Leave a comment below!