The Diono Radian RXT is a convertible and booster combination seat that could be the only seat your child will ever need. The Radian RXT will grow with your child as it accommodates children and infants from 5-45 pounds rear facing, forward facing children in a five point harness from 20-80 pound, and then converts to a booster seat for children up to 120 pounds. This seat was formerly known as the Sunshine Kids Radian XTSL, but some tweaking has been done to it. First the Sunshine Kids name is now Diono and many new features and advantages have been added to this seat as well as a whole new lineup of color choices. Focusing on safety its built on a steel alloy frame, reinforced sidewalls, adjustable head support, patented Safe Stop energy absorbing harness, and EPS foam surround the head and body to provide complete side impact protection. The seat can be installed with ease using SuperLATCH system, the LATCH system on this seat can be used until a child has reached 80 pounds.