This duvet cover is 100% linen. Linen fabric is made from the fibers of the flax plant and is stronger than normal cotton duvets. Not only is it smooth and cool to the touch but it tailors beautifully bringing comfort and softness while holding a very tailored line. This jacquard woven linen is less likely to wrinkle that other flat woven linen products. This duvet is reversible meaning it can be turned inside out revealing the opposite colorations giving this duvet a light and dark background. The duvet features a bottom zipper and interior French seams to allow this reversibility. The back is a cotton flax blend and is a coordinating solid. The shams (available separately) are flanged and are only in the dark background. They also feature the same back cloth and have a split back opening for ease of fill.