The Britax Grow With You™ ClickTight harness-2-booster car seat grows with your child from toddler to big kid. It’s made with a 4-way stretch athleisure fabric for premium style and comfort. Install with confidence, every time. With ClickTight, you know it’s right in 3 easy steps: open, buckle, close. 2 layers of side impact protection surround the head, neck & torso. Plus, SafeCell Technology in the base acts as a crumple zone to help absorb crash energy. Quickly adjust the 9-position harness & headrest using just one hand for the proper fit as your child grows. Once they’re ready to use the seat belt, the 5-point harness tucks away, transitioning to a belt-positioning booster. Color-coded guides help you and your child route the seat belt through the right paths. With arm rests, cup holders and harness comfort pads, even big kids enjoy the ride.