I have to disagree with this. As someone who has travleed extensively in Europe and stood in countless passport lines I have rarely seen Europeans have passport covers. And the fact that European passports come in all different colors, one can with a good degree of accuracy determine where someone hails from.What neck wallet could you recommend?
PS: Smythson Eagle Emblem, etc. - Anyone who travels in even a small "safe" part of Europe can observe reasons why discretion about US passports is doubtlessly advisable; furthermore, even Europeans behave most discretely about their own identification documents.