The kidfix xp offers safety reassurance for parents and comfort for the older child this highback booster seats innovative xp pad gives advanced frontal protection its deep softly padded side wings offer cocooning safety for growing heads and neck from 4 to 12 yearsproduct highlightsreduced frontal impact xp pad diverting up to 3037 source58 britax tests 2013 of energy forces away from neckinstallation to suit any car isofit or seat belt optionsmisuse limiting design intuitive