The trifix is britax latest safest and most beautifully engineered group 1 seat universally approved for use in any car with isofix and top tether anchorage points the trifix is the first seat to feature britax revolutionary isofix installation system our latest innovation in energy management the combination of our patented v tether and pivot link technologies dramatically reduce your childs forward and rotational movement keeping them safer than ever in addition to the deep softly p