Unused item. This was included as a bonus when my parents bought a new bed. A 100% silk duvet cover made by a Japanese manufacturer, size is single long (150 x 210 cm), color is beige. It's washable silk, so I think it's easy to care for. Silk has excellent moisture absorption and release properties, and maintains a constant body temperature, making it ideal as a material for futon covers. Your futon will become bedding that keeps you cool in the summer and warm in the winter, leading to a good night's sleep.