A "Duvet Cover"... encloses the duvet in a large fabric pouch that resembles a huge pillowcase. Our Duvet Covers close with buttons . A "Duvet" is the filling, usually made of polyfill material or down know in America as a comforter. When comforters need cleaning, it is frequently difficult to fit them into a standard automatic washer & dryer . A duvet cover can easily be removed and washed, without the bulky filling. The duvet can be dry cleaned or washed separately. With the great selection here at BlowoutBedding.com you will be sure to find a quality duvet set that suits your needs.