The B-DUAL is a flexible pushchair that, with the addition of a second seat, transforms into an in-line tandem travel system for two children, from birth to toddler. The main seat unit can be used rearward or forward facing and has a lay-flat position for newborns. The B-DUAL can be used for children of different ages or for twins as a seat unit or an infant carrier can be fitted in either the front or rear position.