adapter lets you add on a bassinet or a car seat to your stroller for a sibling. DETAILS THAT MATTER Quick, no-tools attachment. Color-coded dot indicators ensure proper installment. KEY PRODUCT POINTS The Upper Adapter for VISTA models 2015 and later creates more space between your primary and secondary seats. Compatible with VISTA models 2015 and later, Bassinet models 2015 and later, Toddler Seat and MESA Infant Car Seat (not included). Stroller folds with the adapters on (stroller sold separately).