Britax One4Life Slim ClickTight All-in-One Car Seat - Raven BlackCar seats are a final sale! We do not offer returns or exchanges on car seats. Infant Child Slim Car Seat One Car Seat for Life! This versatile car seat grows with your child, accommodating them from birth to big kid. Its slim design saves backseat space while maintaining safety and comfort features. Key Features Extended Use: Rear facing up to 22. 7 kg (50 lbs) Forward facing toddler seat up to 29. 5 kg (65 lbs) High back belt positioning booster up