Create a travel system on your own terms with the Primo Viaggio 4/35 Car Seat Adapter/Links for UppaBaby Strollers. This new adapter works on the Uppa Baby Vista 2015 and Uppa Baby Cruz strollers, with the Primo Viaggio 4/35 infant car seat only. The adapter fits securely into our 4/35 car seats and slides right onto the UppaBaby Strollers. The best feature of these newly styled adpaters is that they do not need to be removed when putting the car seat on the base. Once you put them on, you never have to remove them again.