The City Select by Baby Jogger is one-of-a-kind, multi-functional stroller that allows parents to mix and match seats, bassinets, and car seats to customize their Stroller. The City Select starts with a single stroller but expands to a double by using a unique patented attachment method. As your family grows, simple snap on a second seat and you're ready to take on the town in stylish convenience. And with Baby Jogger's famous Quick-Fold Technology this stroller's convenience is doubled by making it the only-in-line stroller to fold flat in one simple step. The city Select presents 16 unique seating combinations from double tiered car seats to a bassinet and single seat combo. And with a variety of accessory options, the Select offers premium versatility to suit every family's comfort and needs. The second seat, bassinet and car seat are sold separately.