Pottery Barn describes as: Supremely soft and made of organic cotton percale, this timeless plaid duvet cover provides lasting comfort. •Made of 100% cotton percale. A percale weave is noticeably denser and wears well over time. •200-thread count. •Duvet cover and sham reverse to self. •Duvet cover is finished with interior corner ties and a button closure to keep the duvet in place. •Sham has envelope closure. •Duvet cover, sham and insert sold separately. •Oeko-Tex® certified, the definitive mark of excellence for products that are healthy for your children and healthy for the environment. •Machine wash. •Imported.