Cybex Base Z i-Size Car Seat Base The Cybex base Z car seat base can be used to install your Cloud Z or Sirona Z i-Size car seats safely in your vehicle. Due to the individual adjustable ISOFIX connectors as well as the height adjustable load leg, the two car seats gains extra stability and safety on the Base Z. The one-click installation offers a safe and simple installation that requires no further fastening. Installation indicators also help to prevent a possible misuse and to confirm that the seat has been safely and correctly attached for added peace of mind. The innovative rotation mechanism of the Base Z makes it possible to swivel the car seat toward the car door for easier in and out. In addition, it is equipped with a Driving Direction Control (DDC). This prevents forward-facing use entirely (Cloud Z i-Size) or before the child has met the age and size requirements.