Once your child has outgrown their toddler car seat, and is at least 4-5yrs old, they will be ready for a high backed booster seat. Raising the child up so the car's seatbelt fits them as designed, as well as providing body, head and neck protection, high backed boosters are the safest way for your child to travel until they are 150cm tall. Isofix or seatbelt options available to sure your needs from Maxi Cosi, Axkid and Mifold.