Because one is always in protest of something, we have a mirrored X on each lens.
We pay homage to the tour de force- Jane Jacobs.
Remember Jane Jacobs vs Robert Moses (1968) when Moses was trying to put a freeway down the middle of Manhattan? Jane Jacobs and her comittee showed up in plain clothes, with "x's" drawn across their glasses.
Part of proceeds go towards fighting creditors and debt collectors.