The seat has a "soft-latch" system (Lower Anchors and Tether for Children) that can be attached to the ISOFIX anchorage in the vehicle. According to Wikipedia, this system is not permitted as a stand-alone ISOFIX in Europe. Therefore, the seat must always be secured with the 3-point belt and can also be connected to the ISOFIX system. The Soft-Latch system consists of two flexible webbing straps (as opposed to the rigid mounting brackets of ISOFIX) with click connectors, which are connected to the retaining brackets in the vehicle seat. This further stabilises the child seat.