The Evenflo Maestro Sport Booster Seat offers two modes of forward-facing use for your growing child. Accommodating children 22-110 lbs., stage one has a 5-point harness for children at least 2 years old up to 50 lbs., and stage two allows you to use the vehicle belt as a high back booster for children at least 4 years old. The up-front harness adjustment is centralized, making it easy to properly tighten the harness.