But just because a lipstick or mascara proved its longevity in a lab doesn't necessarily mean it'll stand up to everything you throw at it. So, to narrow down the best of the best, I put on a full face of waterproof makeup and headed out for a beach day. Curious to see which foundations, concealers, and lipsticks held up — and which ones washed away with the tide? Click on the video above to find out.