When can a child transition out from the Alta to sitting in a car without a booster using the vehicle’s seat belt?

Children should stay in the Alta, until adult seat belts fit correctly, usually when children are at least  57” /144.8 cm tall.

To ensure a child is ready for a seat belt, the following is recommended:

• The shoulder belt should cross their collar bone then cross their chest cavity
• The lap belt should sit across their lower hip bones and never across their belly
• Knees should bend at the edge of the vehicle seat cushion
• No slouching; a child should be mature enough to sit with the seat belt
• positioned properly as indicated above
• The child’s back should rest flat against the vehicle seat back