The German Batiste is the world's lightest downproof fabric, and it's paired with Eiderdown, the world's most coveted down, for a down comforter from a class all its own. Eiderdown is prized worldwide for its matchless warmth and lightness. Collected by hand from abandoned nests in Iceland and Scandinavia, the annual world harvest is just four tons – truly one of nature's greatest treasures.