From UPPAbaby, these seat adapters feature: Our VISTA allows for multiple second seat configurations. The Lower Adapter for Maxi-Cosi®, Nuna® and Cybex allows you to attach compatible infant car seats to the secondary position on the VISTA. Simply snap your infant car seat into these adapters and you're ready to stroll. Compatible with Maxi-Cosi® Mico NXT, Mico Max Plus, Nuna® PIPA™ Aire Rx, Nuna® PIPA™, PIPA lite, PIPA lite lx, PIPA lite r, PIPA rx, PIPA lite rx, PIPA urbn, Cybex Aton, Aton 2, Aton Q, Aton M (NOT compatible with Maxi-Cosi Prezi) Large hubs and quick, no-tools attachment with color coded dot indicators ensures proper installation Stroller folds with the adapters on Compatible with all Vista* models *Not compatible with pre-2015+ Vista models Imported.