Why this is called multifunction seats? Because the chair seat is not only used for seating can also be used to sleep comfortably. Shape seating made slightly wider because it is very comfortable to relax. When reading the book we often face a sudden sleepiness. For that seating is very suitable for use when we are tired of reading we can just sleep in these seats.
Besides, there are also blanket that can be used to warm the body while we were sleeping. This multifunctional seating makes us comfortable when we are relaxed in these seats. source