The Infasecure Sprinter is a Convertible Booster Seat that is suitable for children aged approximately 6 months to 8 years. It is designed to be used as a harnessed car seat with the in-built six-point harness and once the child’s shoulders meets the middle shoulder height marker, it is then converted into a Booster Seat. The InfaSecure Sprinter is installed with the vehicle’s lap and sash seatbelt, which features an adjustable and locking headrest that is able to grow with your child. The InfaSecure Sprinter also includes our new advanced buckle, which independently locks each buckle tongue separately, unlike traditional buckles that​require you to insert both tongues to engage the lock. This helps eliminate situations where a buckle isn’t engaged and may pop out, keeping your precious cargo as safe as possible.