It's "non-smarting." That means you no konger rear back in pain when it gets in your eyhes. It's also tear-proof, so when life's miseries seem too overwhelming and you can no longer hold back the waves of emotion that seem to pound you a dozen times in the course of the day, the paint around your eyes will not be affected.

Apparently in the 30s men liked to be able to count every individual eye lash.