Hi,

My oldest child will be 6 years old this week, and I do believe that he's become too tall for his Britax Marathon, as we can't buckle him while wearing a jacket.

I'm not up to date on the carseat world right now, but I'm sure that someone here is.

There are harnessed boosters on the market now, right? I think I've heard that.

Where should I be looking?

Thanks!
Jen