Match your Peg Perego YPSI stroller with a selection of car seats using the Peg Perego Adapters for Maxi Cosi, Cybex, Clek, Nuna, Recaro and Kiddy Car Seats. The adapters easily fit onto the YPSI chassis and allow the compatible car seat to safely click onto the stroller. The Peg Perego adapters quickly snap onto the chassis of the YPSI stroller. When it is time to remove the adapters, simply push on the side button to disengage them from the chassis.