This swift-swap duvet cover makes putting your duvet cover on a lot easier. It comes in a premium soft blend of cotton and polyester, combining the natural benefits of cotton with the easy-care properties of polyester. The sateen weave, with its highly packed fabric, provides a silky soft feel while being easy to wash and maintain. Brand: Belledorm. Washable. 67% Cotton 33% Polyester. Please note these 500 thread count fitted sheets are 28cm in depth.