Our cotton satin bedding has a luxurious look, its refined, soft and beautiful to the touch. The 400 thread count long fiber, GOTS organic cotton satin will only get softer with time, making this product something you want to keep for a long time. Cotton satin has a strong durability. Our cotton satin bedding is woven at a reputable textile factory in Portugal that has been spinning and producing bedding since the 18th century. Everything is organic and Oeko-Tex ®, Both duvet covers and pillowcases are closed with a hidden zipper.