Your car's various anchorage points can be used in combination with each other or along with other fastening methods to secure different types of child restraints.
The i-Size child restraint standard uses ISOFIX in combination with the top tether anchorage points or a support leg. This standard ensures that any i-Size child restraint can be used on a seat designated as i-Size approved.
Some child restraints are secured using a car seatbelt, usually in combination with other fastening methods.
Note
Manufacturer's instructions
When using anchorage points, always follow the instructions from the manufacturer of the child restraint.