The Joie Aire Twin is a light stroller with two non-reversible, side-by-side seats. Each seat comes with a double-sided reversible seat liner. The Aire Twin does not offer a possibility to form a fully-featured stroller system, however, the seats can be individually reclined flat, suitable even for small babies. You can, therefore, use the stroller for siblings with a small age gap as well as for twins from birth.