BRITAX infant/child seats can be used rear facing from 5 to 40 pounds (2.3 to 18.1 kilograms) and forward facing from 22 pounds and walks unassisted, up to 65 pounds (10 kilograms and walks unassisted, up to 29.5 kilograms), depending on the seat. High-capacity convertibles allow your child to stay in a five-point harness through the toddler years.