Because we live in a humid city, we're always up for beauty products that say "waterproof" on the label, especially when it comes to mascaras. We hate it when our inked lashes get smeared—it's just embarrassing!So when we heard about the HD Mascara by Browhaus, we knew we had to get our hands on it. The product promises to lengthen, volumize, and curl the lashes sans smearing and running. We also heard that it's very waterproof, so we put it under two tests: bathing and exercising. Here's how it fared:   Stress test: WaterTester: Tisha   I usually take 30...