That item was one of mine that I added, and I realize now that I should have qualified what was said in its description better ("allow them to more easily blend into a crowd", and so forth). I'll see it sorted out. Rest assured that it'll be worked out in future versions of the item in question, and I might see about editing the descriptions of other items that have the same problem ("Ghost Hood").
Do understand that it's only an attempt to provide flavor and explain why the item has the properties it does, and also why it is called what it is.