Mars Social Black Eyeliner Is Designed To Be Water-Resistant Or Waterproof, Meaning It Can Withstand Exposure To Water, Sweat, And Humidity Without Smudging Or Smearing. This Feature Ensures That Your Eyeliner Stays In Place Even In Challenging Conditions. It Is Formulated To Remain Intact For Extended Periods Without Fading Or Running, Providing You With A Long-Lasting And Smudge-Free Look.