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 (5 - 120 lb / 2.2 kg - 54 kg) 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. The 2020 Radian 3RXT provides safe and comfortable newborn positioning thanks to the new 2-in-1 infant positioning liner with integrated newborn travel high wedge. The wedge creates a lie-flat travel position, pushing baby up to reduce head slump while helping to keep airways open. As your baby grows, simply remove the wedge to allow the 2-in-1 infant positioning liner to give extra infant comfort and toddler support. Designed and engineered with complete rear facing protection, radian 3RXT will keep now your precious cargo rear facing for even longer up to 50 lb / 22.7 kg (approx. 4 years old). Then as they transition to forward facing, the aluminum reinforced headrest can be adjusted to one of 12 positions for safety that grows with them up to 57” / 145 cm tall. Built with a mechanically engineered, reinforced steel core, made from automotive grade high strength steel, the radian is always ready to shield and protect. And when your family grows, the slim fit design will fit 3 across in most vehicles without compromising child safety or passenger comfort. As travel experts, Diono have naturally built in super portable features to the radian 3RXT with original fold for easy transport and storage and steel reinforced cup holders to store essential road trip drinks and snacks. The radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go.