High-back booster seat upgraded from our award-winning favourite iZi Flex FIX i Size. This seat is used when the child is ready to sit front facing (from 4 years or older). It combines excellent safety, optimum comfort and quality design to accommodate up to three car seats in a row. For your child’s safety, we recommend that you wait as long as possible before turning them around to face forward. Discover our rear-facing car seats for children over 4 years.