Ghostek Cloak Series for Apple iPhone 6/6s Slim Protective Armor Cover Carrying Case Tempered Glass (Space Gray);

You've finally got them just where you want them. Of course you can see them, but they can't see you. They don't know what you know.
You remain an elusive soldier of the night who escapes in and out of dark corners, while they anticipate your attack in fear and sweat. Let 'em search.
They'll never find you as you slip in and out of disguise. When you're ready to be seen, you'll glow.