As seen on BBC2 Dragon's Den

If the seat belt rubs on the child’s neck, it will become uncomfortable. This sometimes encourages the child to place his/her arm over the seat belt.

This would be very inadvisable as lap belts are proven to be ineffective in accidents. Lap belts are known to cause spinal and abdominal injuries.

The Autosafe seat belt height adjuster, when fitted will prevent the seat belt from rubbing on the child’s neck, perfectly aligning the seat belt into the correct position, thus making the journey ahead a safe and comfortable one

Important: The autosafe Height Adjuster has been crash tested to ECE R44/03 and is proven to reduce injuries and significanlty improve child safety, when used with an approved seat belt. Verified by VCA. The product should only be used in conjunction with an approved seat belt. Please follow instructions carefully.

Warning: Do not place children in front seats equipped with front air bags. This product should only be used by adults/children over 4 years or 18kg. The seat belt should run freely when used in conjuction with the adjuster clip. It is recommended that you use a booster seat for small/young children in conjunction with the Height Adjuster in accordance with legal requirements