Base is equipped with the right tight system which easily and securely locks the base in place for added stability Travel system compatible:Can be used with any travel systemcompatible Peg Perego stroller, without the need for adapters.Infinate recline knob and tri-zone level indicator features allow to always find the proper seat angle to follow child's growth Integrated anti-rebound bar provides superior protection in case of collision Color coded belt paths help in routing vehicle seat belts Modern design with rounded shape bottom allows for a better fit and is gentle on all vehicles upholstery