The Highback Booster is the last stage car seat your child will use. A Highback Booster car seat uses the vehicle's 3-point seat belt.
Using age as a guideline you can use a Highback Booster from approx. 3.5-12 years.
Weight guidelines are 15-36kg.
Height guidelines are 100-150cm.
This could be the car seat that your child uses for the longest amount of time. So why is it more common to see children being rushed into this stage seat (that uses the adult seat belt). And why are there so many cheap poor quality Highback Boosters available?
Your child's car seat prior to this stage would have had an integrated 5-point harness. Your child would have been secured in the car seat by the 5-point harness. When moving to the Highback Booster, your child is secured by the vehicle’s 3-point seat belt as per what the driver or passengers use.
The seat belt is a fantastic piece of safety equipment. It is designed to save lives. It is however designed for adults. It can be used for children when they are positioned in a Highback Booster in accordance with manufacturer guidelines. With this being the final stage car seat, it’s always worth maximising your previous restraint whether that is rearward or forward-facing. If you can keep your child in a 5-point harness for longer, you are delaying using the adult seat belt.
More advanced children’s restraints are now being produced with uprated harnesses beyond the typical 18kg and 4years of age. Where possible follow the restraints guidelines in weight and height and maximise its use. Then look at the Highback Booster stage.