The ISOFIX I size universal system is designed to improve the safety of a baby or child when traveling in a car by providing a safe and secure connection between the car seat and the vehicle. This is an internationally recognized standard for attaching child car seats to the vehicle structure. A seat placed on an isofix I size base complies with UN Regulation No. 129/03 (known as the i-size standard).

The base is compatible with the new Buba ZAZA i-size car seat