These car seat adapters make it easy to move baby from the car to an UPPAbaby stroller. The sturdy plastic adapters attach to UPPAbaby Vista and Cruz strollers, allowing caregivers to fit a Maxi-Cosi, Nuna or Cybex infant car seat to its frame. (Using an UPPAbaby Vista with a primary and secondary seat? The adapters also create more space between them.) Installing is tools-free and super simple, plus color-coded dot indicators make sure everything's properly in place.