Quilt cover, duvet cover and doona cover are one and the same. They’re all designed to protect your quilt from dust and dirt. "Doona" is another beast altogether - it is the filling for your quilt, duvet or doona cover. The word “doona” is said to come from the Danish word “dyne”, which means down feathers. Your choice of "cover" is a good starting point to bring together a beautiful bedroom - just add cushions, bed comforters, comfy sheets and throws in contrasting colours and textures.