Car seats 0-18 kg is a fusion of two groups - “0” i “I”. Such constructions allow to drive with babies and older children - up to 4 years old.
It looks like full-functional car seats. You can set this car seat into lying position (for babies) or sitting position (toddlers). In both situations it is important to put child in rear facing position. Why? Becouse it is the safest solution - statistically. Half of accidents are front impacts - this is important to absorb a hits on all body - not only on neck.
Such constructions can be installed in two ways - by safety harness or by ISOFix system.