Here's what other sites are saying:
Point to the pale kid strapped to your back in the Vaude Butterfly Comfort Kid Carrier and tell the gate agent you're running late for the flight because, "Junior's been puking his guts out all morning." Hopefully they'll wave you through in a hurry, and you'll be able to pop junior out of the easy-access side entry before they pass the carrier through the X-ray machine. A removable cover is washable in case Junior really does end up puking, and the Butterfly Comfort Kid Carrier is adjustable enough to fit him until he's big enough to walk, but still too lazy to bother.
- Backcountry Outlet
Adjustable torso support element offers the child full encircling stability.