The Chicco/Peg Perego Car Seat Adapter is the easiest way to turn your stroller into a customized travel system. Attaching your car seat to a Baby Jogger stroller has never been easier. You can even fold the stroller with the adapter attached, giving you the most versatile travel system available. Compatible with City Premier, City Select, City Select Lux strollers. Compatible with the following infant car seats: Chicco Fit2; Chicco Keyfit 30; Cybex Aton; Cybex Aton Q; Maxi-Cosi Mico Max 30; Maxi-Cosi Mico AP; Peg Perego Primo Viaggio 4-35;.