Among other things, it prescribes the fastening of child seats with Isofix as well as the rearward facing transport of children. Traffic physicians, accident researchers as well as consumer and health organisations - such as ADAC, Stiftung Warentest or international organisations such as Which? - recommend that children should be transported in rear-facing child seats even beyond the 0+ group. In the Cybex Sirona M2, children up to a height of 105 cm can be transported safely in a rear-facing seat. Thanks to the intelligent designs, even taller children have enough legroom to sit comfortably. At the same time, the seat can also be easily installed in small cars. Practical functions such as the one-handed seat and recline adjustment also make daily use easier. Important: The Sirona M2 i-Size can only be used in combination with the Base M and cannot be installed solo in the vehicle. The Cybex Isofix Base M must be purchased separately and is not included.