It's important to know that all auto seats sold in the US must pass rigorous crash-safety tests administered from the NHTSA. You can find currently no rating system for youngster safety seats, but all products that go the NHTSA's tests are deemed safe. That is, provided you install them correctly. https://gogogobookmarks.com/story18907337/detailed-notes-on-rear-facing-car-seats-weight-limits