In this case we are talking about the so-called ‘maxi cosi’, child restraint systems that can also be fitted, in most cases, to a pushchair, either directly or by means of adapters.
Firstly, we should bear in mind that child restraint systems are designed specifically for cars and to protect the child when needed. ‘Maxi-cosi’ seats can indeed be put in strollers but it is best not to do so for more than an hour and a half, since it is not the most suitable position for a small child, especially if they are babies.
Just as carrycots or bassinets do not offer the best protection in the event of a traffic accident, the maxi-cosi type seats do not offer the best ergonomics and comfort for a child in a stroller.