A splayed-open down shirt meets light jacket experiment [#571] in warmth without overheating. Zero snap front with finger garages. Two-way zippered sides allow the shirt to be vented from the hem to the forearm. Adown(45) is a lightweight, soft, breathable and 100% post-consumer recycled down system with a crisp cotton face. The coziness of a down comforter made into a very wearable layering piece for calibrated comfort.