It's important to know that all car or truck seats bought while in the US must pass rigorous crash-safety tests administered from the NHTSA. There is certainly currently no rating system for boy or girl safety seats, but all types that go the NHTSA's tests are considered safe. That is, https://bookmarkstime.com/story19330274/helping-the-others-realize-the-advantages-of-age-and-weight-car-seats