Beauty with Mi, hosted by Refinery29's beauty writer Mi-Anne Chan, explores the coolest new trends, treatments, products, and subcultures in the beauty world. Never miss an episode by subscribing here.

It used to be that your eyeliner needed to last through a 9-to-5 in a temperature-controlled office building — extra points if it was still standing after happy hour. Now, consumers are demanding formulas that can withstand hot yoga, 3-day music festivals, and, in the most extreme cases, even car accidents. The benchmark for long-wearing products has gone from four hours to 12 hours to 24 hours. (Do you people even sleep?!) And brands are keeping their R&D teams busy proving out their increasingly outlandish claims.

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.

Read These Stories Next:
The Long-Wear Makeup Our Editors Will Be Wearing All Summer
The Under-$30 Skin-Care Buys Our Editors Always Recommend
I Tired The $450 "Ice Facial" Celebs Love — & Here's What My Skin Looked Like After