Head position is highly dependent of the booster seat & booster cushion: the backrest positions the child’s head more forward. A child is more prone to lean forwards when riding in a booster with pronounced lateral head protection. During emergency breaking the child’s head doesn’t stay in place and move forward.

Children aged 4-10 (-140 cm) take benefit from the vehicle safety systems, since they are raised in position using boosters,

Add on child restraints should be balanced to the in-vehicle safety design.

The primary function of a high back booster is to position the child properly with the 3 point belt.

For children approx >130cm a booster cushion (without backrest) together with the 3 points belt should be used as their primary restraint.

For shorter children the benefit of a backrest is depending on the vehicle used and the behavior of the child during the specific trip.

François RENAUDIN mention that it is needed to clarify the limit of responsibility for side protection. The maximum stature seems for Dorel not a very clear criterion for the transition.