Often, comforters are designed to be used without a duvet cover. This lets you remove the cover for laundering and sets them apart from traditional pillows, which often come with covers that need to be washed together with the pillow itself. However, some people find it more challenging to clean a comforter without a DUvet Cover as the filling might get tangled in the machine’s agitator. If this is something you are concerned about, it might be worth considering a down alternative comforter, which typically comes with its own cover.