ISOFIX is one of two types of child car seat installation methods. It is a structural element of the seat in the form of a rail, which is connected to the hooks located in the car between the car's back seat and the seat backrest. Not every car is equipped with the ISOFIX system, so make sure that the car you are travelling with is equipped with it before buying a seat with this system. The ISOFIX system is a solution that makes the installation of the seat faster and much easier. It is a useful solution when you need to be able to easily and quickly mount the seat in different cars. Seats mounted with the ISOFIX system can be found in any weight group, both forward and rearward-facing. For the installation of some models, it will be necessary to use a dedicated base and some models have this base integrated already.