From UPPAbaby, these stroller adapters feature: Our VISTA allows for multiple second seat configurations. The Upper Adapters for your VISTA creates more space between your primary and secondary seats. Quick, no-tools attachment Color coded dot indicators to ensure proper installment Stroller folds with the adapters on Compatible with all Vista* models. For all Bassinet models, Vista Toddler Seat, Mesa Infant Car Seats, and Aria Infant Car Seat *Not compatible with pre-2015+ Vista models Imported.