Diono Radian 3QX Ultimate 3 Across All-in-One Car SeatThe Radian 3QX model, is a luxury standard convertible car seat. It's created with multiple layers of durable material, and a steel rebound bar, tested in the most rigid car crashes, for optimal safety. With 4 optional positions in booster or car seat configuration, weight capacity of 120 lbs, adjustable seat, head rest, and 5 point harness loops, it is bound to support endless years of safe travel. Its compact structure enables 3 seats to be aligned