why isn't "duvet" accepted? there's another question in the module "저는 곧 침대보를 세탁합니다" > "I am going to wash the duvet soon." - it's just confusing
I finally got around to checking out what a duvet was; here is what I found from a popular store chain and have copied and pasted, "What is a duvet? Sometimes referred to as a comforter (especially in the United States), a duvet is a type of bedding that is a soft flat bag filled with down, feathers, wool, or a synthetic alternative. It is protected with a removable cover, the duvet cover. The duvet set originated in Europe and was made from down feathers because of its usefulness as a thermal insulator." The bottom line is: a sheet is not a duvet.