Car Seat FeaturesForward facing 100 to 150cmEasy to adjust, ergonomic headrestBuilt in ventilation for better air circulationMachine washable cover2-Year warranty when registeredNeed help Read our Car Seat GuideAbout this Car SeatThe Britax Römer KIDFIX M i-SIZE is a highback booster with flexible installation options to suit any vehicle. Suitable for use from when your little one reaches 100cm (usually around 4 years old) until they no longer need a car seat when they reach at least 135cm or 12 years old. Made in Germany, with the whole product development under one roof alongside their state-of-the-art crash testing facility, you can be sure your little one is as safe as can be. Britax Römer have designed the KIDFIX M i-SIZE in partnership with leading car manufacturers and redesigned the seating area has been redesigned to help reduce the neck loads by up to 10%. Not only that, the seat is easy to adjust, as the headrest and upper belt guide are simple to raise or lower to fit yo