The beauty of this travel system is that it's two fantastic products in one convenient package. Many other travel systems have a great car seat or a great stroller, but rarely do both exceed expectations. The B-Agile stroller is a sporty three-wheeled lightweight that can be used from birth to 55 pounds. The seat reclines to any position baby prefers. It has a good-sized basket beneath for your gear. You only need one hand free to fold it up. Readers love the B-Agile stroller paired with the B-Safe infant car seat, which can be used for babies from 4 to 30 pounds. However, the docking system also works with the Britax Chaperone infant car seat, and you can purchase an extra adapter if you want to use the stroller with several other infant car seat brands.