The Baby Jogger Car Seat Adapters let you quickly and easily turn your stroller into a customized travel system. Use these adapters to attach your Maxi-Cosi, Cybex or BeSafe infant car seat to your Baby Jogger City Sights stroller. Use only with certain Maxi-Cosi, Be Safe, or Cybex infant car seat models; find a full compatibility chart on the Baby Jogger website.