The City Select is the stroller for the growing family. It's convertible, which means that it can be either a single or a double stroller. It's got Baby Jogger's signature easy fold. And because it turns into a tandem double stroller the City Select can fit through doorways with more ease than a side-by-side double stroller.The City Select has 16 different configuration options so that you can choose what works best for you. It comes in 4 color options, Ruby, Quartz, Onyx, and Amethyst. It's compatible with most major car seat brands by using a car seat adapter. It also has bassinets so that you can put an infant in the stroller directly. It's popular and easy to use.