A duvet cover is a fabric case that fits around a duvet and closes with buttons, snaps, or zippers, and it protects the duvet from bacteria and germs. When it comes to what goes inside a duvet cover, there are several options:

• Duvet insert or comforter: A duvet insert and comforter are effectively identical bedding pieces that are soft, often cotton shells filled with lofty down or down alternative that are ideal for use within a duvet cover. They feature practical corner loops that coordinate with ties on the cover to hold them in place.

• Heirloom blanket or quilt: You can also use an heirloom blanket or quilt with sentimental value inside a duvet cover.

• Nothing at all: You can choose not to fill your duvet cover and use it as an additional blanket or a top sheet. As the cover often comes with a soft material, using it as other bed linen items is acceptable.

It is recommended to use a duvet insert or comforter for optimal comfort, but the choice is yours. If you use a duvet insert or comforter, the corner ties on the cover will pull it in and prevent it from slipping and sliding inside the duvet cover.