ISOFIX is the international standard for child seat attachmenta. For ISOFIX, the car seat is connected to the vehicle structure.
Five-point seat belts are safety belts that run over the shoulders, chest and between the child's feet. This attachment system is mostly used in category I and II car seats.
Three-point belts for children's car seat are safety belts that lead across the shoulders and between the child's feet, where they are secured. This attachment system is mostly used for 0 and 0+ category seats.