With the optional seating arrangement, the airplane can now accommodate a fifth passenger on a split bench seat. Cirrus is not touting it as being large enough for three full-sized adults, and there are no changes to the operating weights of the airplane. The center belted seat is narrower and is a good fit for a small child between adults or for a group of youngsters. The extra room also adds a touch of convenience. Even where there are just two in back, there’s a space between the two full-sized seats, giving passengers extra room for personal items, such as laptops, a small cooler or light jackets. The big rear bench seat also folds down (though not quite flat) with a 60/40 split, so you can load bags on one or both sides, for added loading flexibility.