Floral Single Duvet Covers The Imogen duvet cover by Joules features an all over floral design with an adorning hand-drawn bee print on the front and a horizontal stripe reverse. The duvet cover is made with 100% cotton percale styled in a fine cord piping with 5 creme and caramel “Joules” inscribed buttons. The images show the duvet cover, print and button detail. Also on display are other products available within the collection: Oxford and standard pillowcase.