STROLLER COMPATIBILITY: UPPAbaby Vista (models 2015-2019), Vista V2, and Vista V3 strollers. TO BE USED WITH: Toddler Seat (comes with Vista), Bassinet, Aria, Mesa/Mesa V2, Mesa Max Infant Car Seats. NOT compatible with RumbleSeat accessory. TRANSFORM YOUR VISTA: Our Upper Adapters for your Vista allow for multiple seat configurations and create more space between your primary and secondary attachments for a comfortable ride. QUICK ATTACHMENT: A quick, no-tools attachment with color coded dot indicators ensures a proper and secure installation. FOLD-FRIENDLY: Stroller conveniently folds with the adapters on.