Many many years ago we lived in Germany and rented a furnished apartment in a family's home. The bed was king size, like 2 twins pushed together but they didn't come apart. The only cover was 2 very fluffy thick (maybe down) comforters in duvet covers. Neither of them hung off the side of the bed. Rather than covering the bed to make it, we folded each cover at the foot of the bed. I loved having the sheet and blanket all in one and neither of us hogged the covers because we each had our own. I have tried for years to find duvets like those, but to no avail.