The Diono Radian® 3RXT is the original 3 across All-in-One convertible car seat, trusted by over a million parents to protect their child from birth to booster (2.2 kg – 54 kg / 5 – 120 lb) Lovingly engineered with the famous Diono Steel Core and now rear facing for even longer, expect 10 years of safety from just one car seat. Features: -Newborn travel high wedge to create a lie-flat travel position. Then as your baby grows, simply remove the wedge to allow the 2-in-1 infant positioning line to give a cozy, comforting support. -With 4 ways to travel from birth to booster, the radian® 3RXT adapts as your child grows to offer a custom fit from birth up to 54kg / 120lb. -Fit 3 across in most vehicles without compromising child or passenger comfort. -Designed and engineered to keep your child rear-facing for even longer up to 22.7kg / 50lb (approx. 4 years old) -Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect -SuperLATCH™ system makes installation easy and super secure. An audible click lets you know when connectors are locked in safe. -Super portable and fold flat for easy travel. They are also FAA Approved and certified for use on an aircraft -Easy remove covers. So when the next journey gets messy, easily remove to machine wash. -Features an aluminium reinfornced headrest, that can be adjusted to one of 12 positions to protect up to 57″ / 145 cm tall. -Rear-facing : 2.3-22.7 kg / 5-50 lbs -Forward-facing: 10-29.5 kg / 22-65 lbs -Booster mode: 18-54 kg / 40-120 lbs -10 years durability