We actually have a clear backpack that my wife bought at a NASCAR race in Charlotte one year.it meets the regulation in size and is also see through.most of the security guards at the front of the disney parks compliment us on it but we have had a few die hard guards who still plundered through it.however I don't like the idea of everyone being able to see everything I have in there.camera,cellphones,wallet,ect.we are currently looking at a couple of non-clear backpacks from Dakine.