Linen is the perfect choice for any duvet cover, and duvets too. Just like cotton, this is lightweight, easy to maintain and very soft and comfortable. They are easy to find also, as many bands understand the comfort of using linen covers and work with the same. Coming to maintaining them, you can hand wash them or even put them in your washing machine. Make sure you don’t add other clothes with them. The cover should be separated from the duvet, although you can wash them together. Do this only if your machine is large enough to handle the weight of both of them. You should also allow it to dry completely, especially the duvet and then put the cover on it. If you buy luxury modern duvet covers, then dry cleaning them would be a good idea, particularly for the silk ones.