Simple lines and dabs of color give the Blossom 100% Cotton 3-piece Duvet Cover Set - by Superior a modern yet inviting style that's definitely going to make a positive change in your bedroom. This 100% cotton, 200-thread count set includes a duvet and shams that are offered in all the standard sizes. The duvet uses button-closure to keep your comforter in place, and each piece in this set is machine-washable.