Are high-back booster seats with a 5-point harness recommended for children approximately 10-30 pounds?

High-back booster seats with a 5-point harness are not specifically recommended for children who weigh approximately 10-30 pounds. Typically, a 5-point harness is designed for use in car seats rather than booster seats. These harness systems are appropriate for infants and toddlers who are within the weight limits of rear-facing or forward-facing car seats.

In contrast, booster seats, whether high-back or backless, are intended for older children who have outgrown their car seats but are still not tall enough to safely use the vehicle's seat belt alone. The transition to a booster seat usually occurs after a child has surpassed the weight limits of a car seat that utilizes a harness system, which generally starts at around 20 pounds. Therefore, for children weighing between 10-30 pounds, a car seat with a harness is the appropriate and safe choice, rather than a booster seat.