The Original 3-Across All-in-One Car Seat upgraded. With 12 improvements from the original Radian® 3R®, 3R® SafePlus™ features Diono SafePlus™ engineering, SafePlus™ Easy-Adjust 12 Position Headrest, and improved SafePlus™ Side Impact Protection for complete protection from birth to booster (now suitable from 4 - 120 lb.)