William's duvet cover in smoke blue features a geometric jacquard design - "Pied-de-poule, a pattern stylized as broken checks". It came into fashion in the middle of the last century thanks to the famous Madame Coco Chanel. The elegant classic style is still sought after today and popular in textile interior design. The decorated elements and bed sheet are made out of smooth 300TC sateen that ensures its high hygienic properties and longevity.