This is the Maxi-Cosi Toby for group 1 so children form 9 months to 4 years or 9-18kg in weight. It comes in a big selection of different colours so you can get one to suit the colour of your car or the personality of your child. It is installed using the car seat belt with a special belt tensioner to make sure that it stays securely in place. It is spring loaded on the harness so it stays out of the way when you are getting the child in and out. It has headrest and harness adjustment so you can extend it as the child grows.