This car seat claims to be the strongest in the world, thanks to its steel alloy frame and aluminum-reinforced head support. For this
reason, the Sunshine Kids Radian XTsl accommodates a child up to 80 pounds. Have multiples? Its slim profile lets you fit three across the backseat of some vehicles. 5 to 45 pounds rear-facing; 20 to 80 pounds forwardfacing, up to 53 inches.