Group 0+/1 and group 1 have a slight crossover in their weight recommendations. A rear-facing group 0+ infant carrier will last until your child reaches 13kg. However, a group 1 car seat is suitable for little ones between 9kg and 18kg (approx. 9 months to 4 years old). The only time you should move your child to this category, before they reach 13kg, is if they outgrow their carrier by height. You can have peace of mind when it comes to our group 1 car seats. They’ve been rigorously tested, to ensure optimum comfort and safety for your precious angel!