What must children in booster seats be secured with?

Children in booster seats must be secured with a seat belt, which is designed to provide the necessary restraint for safety. A booster seat elevates the child so that the adult seat belt fits properly over their body. This means that the seat belt needs to be used as it helps to position the lap belt low across the upper thighs and the shoulder belt across the shoulder and chest, enhancing the child’s safety in the event of an accident.

Using only a lap belt or only a shoulder belt would not provide adequate protection. A lap belt alone does not secure the upper body, while a shoulder belt without the lap portion can pose serious risks. Moreover, a harness is typically used in forward-facing car seats for younger children rather than in booster seats, which rely on the vehicle’s seat belt system for proper restraint.