- Sep 07, 2019-

A modern duvet, like a sleeping bag, may be filled with down or feathers of various quality and cost, or silkwoolcotton, or artificial fibers such as polyester batting.

While a comforter is fundamentally the same as a duvet in terms of construction, it is used somewhat differently. In the United States, comforters are used on top of the flat sheet, often without a cover.