As a topper for the coldest nights of the year or, in the Scandinavian style, the only cover you use, a battened comforter with natural down or an ultralight synthetic fill is a must-have for the modern home. Look for hypoallergenic fill with unbleached fabric on the outside for guests.or treat yourself to a luxury goose-down dream maker. Topped with a duvet, it can complement a variety of looks.