Gets sweaty immediately
I made the wrong assumption that this product would be at least somewhat effective against perspiration, but that is not the case. I wore it on a walk, and within minutes it was wet -- and I don't perspire very much. If my passport had been in direct contact, it would have been ruined. Fortunately, I had it inside another cover, but even then, the cover itself was soaked and threatened the integrity of my passport. This one is going in the trash, unfortunately.