The Römer ADVANSAFIX M i-SIZE car seat is designed to protect children from 15 months to 12 years of age. Meets the i-Size standard. You can rely on it on being as safe and flexible as possible. It converts from a seat with a built-in harness for smaller children to a seat with a high backrest for larger children in a few simple steps. Children weighing up to 21Kg can use the five-point harness.