A duvet cover is a removable fabric case that slips over a duvet (a soft, flat bag filled with down, feathers, wool, or synthetic materials) to protect it from dirt, stains, and wear

. It functions similarly to a pillowcase for a pillow, providing a protective layer that is easier to remove and wash than the duvet itself

. Duvet covers often have closures such as buttons, zippers, snaps, or ties to keep the duvet securely inside and can be made from materials like cotton, flannel, or silk

. They also serve a decorative purpose, allowing you to easily change the look or style of your bedding without replacing the entire duvet

. In summary, a duvet cover:

• Protects the duvet during use
• Is removable and washable
• Allows for easy style changes of bedding
• Often replaces the need for a top sheet in bed-making, especially in European practice

Thus, the duvet cover is an essential bedding accessory that combines practicality with aesthetic flexibility.