Too old for a booster? Says who? – CarseatBlog

This isn't a full review, but I wanted to share our experience with the original Britax Frontier model in booster mode.  In short, we love it :).  This is Karsten last summer, he was almost 12, about 90 pounds, and about 60 inches tall.  That's the top listed height limit for the original Frontier model.

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