One4Life convertible to booster car seat grows with your child for 10 years. The only all-in-one with ClickTight. One4Life convertible to booster car seat grows with your child for 10 years - from 2.3 - 54kg & up to 160cm tall. As the only all-in-one with ClickTight, it’s easy to install in seconds, so you’ll know it’s right. Every time. Travel with peace of mind, knowing your child is surrounded in Trusted Britax Safety and Full Body Protection. Features: Patented V-Shaped Tether with staged-release stitches helps slow and reduce forward movement during a crash. High Strength Steel Frame reinforces the seat structure to help keep it sturdy and stabilized. SafeCell Technology acts as a crumple zone, absorbing crash energy to help keep it away from your child. 2 Layers of Side Impact Protection: Energy-absorbing shell and foam-lined surround your child’s head, neck & torso. 5-Point Safety Harness with diamond weave webbing. ClickTight Installation. Install with confidence, every time. Converts from a rear-facing infant seat (2.3-22.7kg) to a forward-facing 5-point harness seat (10-29 kg) to a high-back belt-positioning booster seat (18.1-54kg). 10 years of use: grows with your child from 2.3-54kg. Color-Coded Belt Guides make it easy to route the seat belt through the correct paths for rear-facing, forward-facing, and booster mode. Removable Cover for easy cleaning without taking off the harness. Dishwasher-Safe Cupholders easily twist out for cleaning between rides. Easy-Pull Harness Adjuster lets you tighten the harness using just one hand. Harness Holder Slots keep the harness straps out of the way while your child gets in and out of the seat. Tether Storage keeps the tether straps organized and out of the way when not in use. 15-Position, Quick-Adjust Headrest & Harness create the proper fit as your child grow. Stay-Put, Soft Comfort Pads help prevent the harness from rubbing against your child’s delicate neck. Flip-Forward Buckle Pad stays out of the way for easy boarding; made with extra padding for premium comfort. Built-In Cooling Channels & Ventilated Mesh improve airflow to keep your child comfortable. Removable Infant Insert helps keep your tiny baby safe and comfortable under 9kg. Removable Head Pillow provides additional comfort for your growing baby. Built-In Arm Rests keep your child happy and comfortable while they ride. Tag-Free Headrest supports your child’s head and neck without irritation. Recommended Lifespan of 10 years from Date of Purchase