A duvet is a thick bed covering, kind of like a thicker version of what is called a comforter in the US. They can be really comfortable, especially if you like your covers to weigh a little more, but it’s a hassle to wash and dry them. To reduce how often you have to wash the duvet, removable covers fit around the duvet. Conceptually it’s kind of the same reason we put pillow cases on pillows.
Because of how large and floppy the duvet is, it’s kind of hard to get them all the way into the corners of the covers, and if you don’t have them in the corners well they can migrate around and bunch up on one side. To help combat that some duvets and covers have little straps in the corners you can tie together to keep everything in place.
A duvet is a thick bed covering, kind of like a thicker version of what is called a comforter in the US. They can be really comfortable, especially if you like your covers to weigh a little more, but it’s a hassle to wash and dry them. To reduce how often you have to wash the duvet, removable covers fit around the duvet. Conceptually it’s kind of the same reason we put pillow cases on pillows.
Because of how large and floppy the duvet is, it’s kind of hard to get them all the way into the corners of the covers, and if you don’t have them in the corners well they can migrate around and bunch up on one side. To help combat that some duvets and covers have little straps in the corners you can tie together to keep everything in place.