Please note that the inner core of the kids futon. A futon core made specifically for kids sizes that are slightly smaller than junior sizes. Teijin Mighty Top 2 ECO-friendly, mite resistant, antibacterial and deodorizing fibers. *This set is compatible with a duvet cover size: 35.4 x 55.1 inches (90 x 140 cm). Please note: (About Kids Sizes) A newborn baby sleeps very quiet! However, after the last half of years it will turn over and over frequently and when you are celebrating a 1st birthday part, the Goron (xx) is too energetic to protrude from the comforter or hit the playpen to prevent the rhythm of sleep... In mind that your childs movement and growth, the "Kids Size Collection" is larger than traditional baby bedding. Modern ages 2 to 6 Built according to the height of boys of age (about 120cm). It is also easy to use even for small children to elementary school students.