Sleep Science • Article

What is a Duvet Cover?

Jennifer Larson

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If you’ve ever wondered “what is a duvet cover?”, we’re here to help. Because the terms “duvet” and “duvet cover” are sometimes used interchangeably, it’s natural to wonder “what’s the difference?”


A duvet cover goes on over your comforter or duvet insert, like a pillowcase for your pillow.  This removable cover is open on one end and typically has a button or zipper closure. It may also have ties sewn into the inside to hold the duvet insert or comforter in place and secure.


 Because they’re easy to remove and wash, duvet covers can help extend the life of your comforter or duvet insert.  Sleep Number® duvet covers sets are available in a variety of stylish colors and patterns and are a simple way to update your bedroom.

Shop Sleep Number Duvet Cover Sets 



Watch this video to find out how to easily put on a duvet cover or follow these instructions.



  1. First, turn the duvet cover inside out and lay it on your bed.

  2. Then place your comforter on top and fasten all corners ties to keep the comforter from shifting.

  3. Next, reach inside the duvet cover and turn it right side out from one corner. Repeat with the other corner.

  4. When your comforter is inside, zip the duvet cover closed, fluff and enjoy.



Duvet covers are available in a range of fabrics, so it’s important to choose one that’s right for you.


  • Cotton duvet covers are lightweight and breathable with a smooth softness that increases over time. Sleep Number® duvet cover sets, like the Printed duvet cover set, and Windowpane duvet cover set, are available in stylish colors, patterns and textures to help you create a look that’s perfect for you. Our duvet cover sets are 100% cotton so they’re long-lasting, easy to wash and will protect your comforter for years to come.

  • Linen duvet covers are soft and lightweight. Linen’s loose weave makes it highly breathable, so it helps you stay cool in summer and comfortable in winter. A durable fabric, linen gets softer over time and can last for many years.

  • Flannel duvet covers are designed to keep you warm and cozy. Flannel is cotton that’s been brushed on both sides to create a softness that helps retain heat during colder months. It’s also breathable and easy to wash for lasting comfort.



A duvet insert is a layer that goes on top of your bed to keep you warm. It’s typically filled with down feather clusters or synthetic down alternative fibers and encased in a duvet cover. Quilt patterns help keep fill from shifting, so warmth is spread evenly throughout.


A comforter is also a bedding layer with insulated filling. Comforters are available in white or in colors and patterns to complement your bedroom décor, whereas duvet inserts are usually white and require a cover. All Sleep Number® comforters have corner loops to keep them secure within our exclusive duvet covers.




A duvet insert is essentially the same as a comforter; they’re both a layering piece with insulated fill to keep you warm. The difference between a duvet and a comforter is that comforters are often available in colors and patterns, while duvet inserts are typically white and are paired with a removable duvet cover for protection, color and style.


Shop Sleep Number® duvet cover collection


Like diet and exercise, quality sleep is essential for optimal well-being and performance. Because everyone's sleep needs are different, Sleep Number® smart beds, with SleepIQ® technology inside, sense your movements and automatically adjust firmness, comfort and support to keep you both sleeping comfortably. Find your Sleep Number® setting for your best possible night's sleep.


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