What is Isofix in a car?
Isofix is an international standard for fixing child car seats in place using a pair of metal mounts attached directly to the car’s chassis. How does it work?
To secure the child seat to the Isofix mounts, you simply click the clips on the seat onto the mounts in the car. In most cases, you will then get a sign – an indicator on the seat turning from red to green, for example – to show the seat is properly installed.
Beyond that, seats are further secured using either a foot prop that rests on the floor of the car (often with its own indicator to show it’s properly installed) or a Top Tether, a strap that attaches to a dedicated mount, usually on the back of the car’s seat or in the boot floor.
First, it makes it much quicker and easier to install a child seat; and secondly, it removes any guesswork from the process, as you can see immediately whether the child seat is installed properly, rather than relying on your judgement as to whether the straps are pulled tight enough. It also removes the likelihood of mistakes being made while the seats are being installed.
In terms of how parents use them, there’s no difference between i-size and Isofix seats. They’re all secured in place using the same anchorage points, for a start. The difference is that i-size seats conform to new laws, which are designed to make child seats safer, by ensuring children remain rear-facing until an older age, and that the seats have a minimum amount of protection from side impacts.