How does the seat perform with and without ISOfix?

The BeSafe iZi Flex FIX i-Size is certified with and without the usage of the ISOfix anchorage. If available, it’s always better to use the ISOfix anchorage since it secures the seat better when there is no child in the seat (and the vehicle belt is not used to secure the seat without child). The safety performance is almost the same with or without the usage of the ISOfix anchorage.