I agree. The aviator harness is more secure. If you want a good harness for going outside, I wouldn't rely on the flight suit. I almost lost a bird outside after it got the harness off. I have used the flight suit before just as a diaper when they go to someone's house. You can change the pad inside every few hours. I supposed if the poop pouch gets pressed into the bird somehow it could get on the bird, but I never had that problem. I don't really use it much anymore because my birds tend to stay on their travel cage when they are at someone elses house.