What is the Endy Duvet Cover made of? Administrator 23 January 2020 15:47 Updated The Endy Duvet Cover and shams are made from 300 thread count organic cotton in a single-pick, sateen weave. Related articles Does the Endy Duvet need a cover? What is the Endy Organic Cotton Duvet Cover thread count? What are the dimensions of the Endy Organic Cotton Duvet Cover? Can another duvet fit with an Endy Duvet Cover? What is the difference between a duvet and a comforter?