The slimline & lightweight Secure Comfi Treo booster seat is designed to adjust for growing bodies so your child can grow up loving this amazing car seat. It is also scored highly by the independent experts of CREP. This seat is designed to be used by children between the ages of 6 months and 4 years and will adjusts accordingly. It is also made from breatheable fabric that allows your child to stay cool on even the longest journeys, so less complaints for Mum & Dad. The seat converts easily between a car and booster seat so you can use it how you choose.