One4Life Slim takes your child from birth to big kid with Britax safety, ClickTight installation, and a slim 17.5” design, growing with your child for 10 years. Why You'll Love It ClickTight Installation Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed! SpaceSaver Design Slim outside, spacious inside! 17.5” seat helps you save backseat space without compromising on trusted Britax safety and premium comfort. Hassle-Free Cleanup Clean under the seat with ease – wipe it down with no fuss. Patented V-Shaped Tether Staged-release stitches help slow and reduce forward movement during a crash. High-Strength Steel Frame Reinforces the seat structure to help keep it sturdy and stabilized. Energy Management Protective seat shell and foam-lined headrest help absorb impact energy. SafeCell Technology Acts as a crumple zone, absorbing crash energy to help keep it away from your child. 15-Position No-Rethread Harness Adjusts quickly with one hand to help create the proper fit. Dishwasher-Safe Cup Holders Slide out with ease for convenient cleaning.