My magic band fell off while I was in line or on Expedition Everest. I had taken my backpack on and off to rearrange my stuff, and I assume it fell off one of those times. I didn't notice until I was off the ride. I wouldn't wear it in the airport because I'd be afraid I'd pop it off while shifting bags - and I wouldn't even notice, like at the ride. I keep ours in my carry-on until we get closer to the magic express check in.