Redesigned for even greater safety and comfort, the Britax Romer ADVANSAFIX IV R is a fabulous Group 1/2/3 seat for your little one to travel in from 9 to 36kg. It's packed full of features to help make their journey better and your life easier, as well as advanced safety features for your peace of mind. Installing the ADVANSAFIX IV R is a breeze. In group 1 mode, you use the patented Pivot Link ISOFIX arms to connect to the ISOFIX points in your vehicle and a V-shaped top tether strap to stop the sear rotation and reduce the forward momentum in the event of a collision. The twin anchorage points offer superb stability- more than a regular top tether system, and the stitching in the tether is designed to progressively rip, slowly and controlled after an impact, absorbing some more of the force. When your little one grows, you can easily switch to the Group 2/3 high back booster mode. From 15kg (max 18kg) you can use the FLIP&GROW function to change the integrated harness that holds you