Stage 3 - Recommended 5 years and 50lbs to 4ft 9in

Booster seats help protect children by lifting them so the lap and shoulder belt connects with their strong bones. Children should remain in a booster seat until the seat belt fits correctly with out it, at a minimum of 4ft 9in tall

Seat belt: always use a lap and shoulder belt with a booster

Head Support: child must have head support at least to the top of the ears from either the high back booster, the head restraint, or the vehicle seat back

In vehicle: in the back seat