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In most cases, a duvet cover is constructed by stitching together two rectangular sheets of cloth on all four sides. One sheet is then cut lengthwise along the center, allowing the duvet to be fitted within the cover once it has been folded. Additionally, high-end duvet covers include ties at each corner, which allow the duvet cover to be fastened to the duvet at each of the four spots where it is tied. This design prevents the duvet from being bunched up within the cover.

Duvet covers often have buttons, ties, an envelope flap, or zipper as a closure to keep the insert enclosed. It should be noted that a Duvet is the insert that goes inside the Duvet Cover; usually comprised of down or a down alternative. When the insert and duvet cover are together, sometimes it is referred to as a Comforter. It is common for Duvet Covers to have finishing details like flanges or embroidery along the side and bottom edges only.