Graco’s AFFIX Highback Booster Car Seat with Latch System, in Atomic, helps keep your growing child safe. The American Academy of Pediatrics (AAP)—one of the most respected resources in child safety—recommends that children 4 feet 9 inches tall or under should ride in a belt positioning booster seat. In support of the AAP recommendation, the AFFIX Highback Booster Seat with Latch keeps your 'big kid' riding in high back booster seat mode from 30 – 100 pounds and from 38 – 57 inches tall. Then, when your child is ready, it converts to backless mode for children 40 – 100 pounds and from 40 – 57 inches tall. It’s like having two booster seats in one!