From infant car seats, to convertible car seats, to booster car seats, Britax will provide the best child safety seat for your baby as they continue to grow. Britax infant car seats are compatible with all their strollers and are suitable for children up to 30 pounds. The adjustable harness and buckle positions allow the safety seat to grow with your child. Britax convertible car seats are good up to 70 pounds and feature energy-absorbing tether weaving, integrated steel bars and SafeCell technology to minimize impact and movement in an accident. Britax booster car seats work with your vehicle's safety belt, teaching your child to buckle-up, while ensuring they are still positioned comfortably.