Fall for flax. Our Belgian Linen Duvet Cover is woven from fine Belgian flax, which is washed for a luxe, lived-in look. Prized for its breathability and softness, linen keeps you cool in the summer and warm in the winter, making it the natural choice for the master bedroom. 100% Belgian flax. Duvet Cover: Button closure; four interior corner ties keep it in place. Shams: Envelope closure. Due to the wash process, color will be unique to each piece. Select sizes are online/catalog only. Linen woven from Belgian flax, constructed in China.