> Hoffman warns that the carrier is not foolproof, especially during severe turbulence. “The child can slip out of it because of all of that force. A plane that falls 4,000 feet in seconds — that’s like being shot out of a cannon. A front pack is not going to do the same as a car seat.”

How common is it for a plane to fall 4,000 feet in seconds? Sounds like it would result in deaths for anyone who isn't strapped in at that moment.

We've used car seats at times, but also have used an Ergo to strap our kid to our front. It is more than enough for the type of turbulence that we've ever experienced in a combined 80 years of flying, though of course there is a possibility that something stronger could hit.