Graco milestone all in one car seat is the only car seat youll ever need for your growing baby this car seat will grow with your child from birth up to 36kg making it one of the only car seats you will ever need its comfortable for your little one and even more convenient for you this convertible car seat has three different modes transitioning from rear facing infant car seat birth to 13kg to forward facing 5 point harness seat 9 18kg to high back booster 15 36kg for the best an