"Add-on" products for child passenger seats are designed to be used with the car seat, but have not been supplied by the manufacturer. These products may include head supports, harness strap covers, head support cushions, additional padding behind the child, padded car seat bags, mobiles and shoulder belt positioning devices.
Some of these products can cause safety issues, such as slackness in the shoulder harness system. They can cause your child to be either partially or fully ejected from the car seat if there was a crash.
