I'm really stumped on this one. DS is 2.3 but almost 18kg and in need of a new car seat. From what I've read booster seats mean that children's heads loll about when they sleep, and DS sleeps in the car a lot. Are there any more compact seats which would fit him?
Would LOVE to get Isofix as our new car has fixing for it, but as far as I know they only go up to 18kg, grrrrr!