BRITAX convertible car seats can be used rear facing from 5 to 40 pounds and forward facing from 1 year and 20 pounds, up to 70 pounds, depending on the seat. High-capacity convertibles allow your child to stay in a five-point harness through the toddler years.
The BRITAX Combination Harness-2-Booster seats can accommodate children forward facing only in harness mode from at least 2 years and 25 pounds, up to 85 pounds. The seats can then convert to a belt-positioning booster seat and accommodate a child to 120 pounds.
BRITAX belt-positioning booster seats raise the child so that the vehicle’s lap and shoulder belts fit correctly on your child’s hips and shoulder. Belt-positioning booster seats must be used with a vehicle lap and shoulder belt system, NOT a lap-belt only system.