The Corso Flex Convertible Stroller starts as a single stroller for babies and toddlers with the ability to convert to a double stroller or twin stroller. With modular components and with both upper and lower mounting positions, Corso Flex offers flexible riding options that will fit your needs.The Full-sized Modular Toddler Seat features a multi-position, one-hand recline, adjustable footrest and UPF 50+ canopy with pull-out extension and mesh peek-a-boo panel. The toddler seat mounts interchangeably into the upper position (either forward- or parent-facing) and the lower position (forward-facing only) - giving you maximum seating and storage flexibility.Compatible with all Chicco infant car seats, Corso Flex converts to a frame baby stroller with an included Infant Car Seat Adapter/Basket.In addition to the extra-large stroller basket with front and rear access, the included Shopping Basket component can be mounted in the upper position while the Infant Car Seat Adapter/Basket provides even more storage options when used without an infant car seat. The toddler seat also features a mesh storage pocket on the back of the seat. The parent tray includes two large cup holders and a covered storage compartment.Corso Flex features maintenance-free treaded rubber tires with foam cores, all-wheel suspension plus wheel and swivel bearings for the smoothest stroll. The linked rear brakes secure the stroller with a simple tap.When ready to stow, the stroller can be folded from any configuration and combination of seats. The one-hand, quick-fold design is compact and stands on the wheels without the handle touching the ground.Corso Flex can be used as a stroller for 2 kids with the integrated sit or stand position offering a folding youth seat with three-point harness and a standing platform with grip bar. A bonus, UPF 50+ accessory canopy attaches to the stroller frame and rotates to offer additional sun protection - perfect with the sit or stand position. The standing platform is built-in but does not interfere with your walking space while the youth seat can be folded out of the way when not in use.Corso Flex offers everything you need in a single stroller, while providing options to use as a double stroller or twin stroller. Continue to build new configurations by adding a second Infant Car Seat Adapter/Basket and Chicco infant car seat or a second Full-sized Modular Toddler Seat (all sold separately).