This swift-swap duvet cover will make the task of putting your duvet cover on a lot easier. It comes in a premium soft blend of cotton and polyester, bridging the natural benefits of cotton and the easy care properties of polyester; plus there's a sateen weave of highly packed fabric for a silky soft feel while at the same time it's easy to wash and maintain. Brand: Belledorm Washable 67% Cotton 33% Polyester Please note these 500 thread count fitted sheets are 28cm in depth. Belledorm Premium Blend 500 Thread Count 67% Cotton 33% polyester Flat Sheet,Double White Our Premium Blend 500 thread count Cotton Rich range combines the luxury of cotton with the benefits of being easy care. A silky sateen weave, woven to feel like cotton, wrinkle free wash after wash, this high thread count blend is simply the best of both worlds.