Duvet covers can be tricky to change, but using one is essential for extending the life of your comforter (or duvet). And swapping the cover can easily transform your bedding—a heavier fabric will boost a duvet’s warmth, and a luxe cover will instantly elevate its style. We spent a combined 96 hours researching duvet covers and testing 16 to find six well-made, comfortable options for a range of climates and tastes.
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