One SMASHBOX Always On Liquid Eyeliner in Black 0.02 oz Easily lines and defines eyes with a high pigment, waterproof formula that lasts for up to 24 hours. The super-fine and easy-to-control tip precisely draws thin-to-thick lines, making it easy to ace any look—even if you’re a beginner. The formula goes on smoothly, with the fluidity of a sharp-point marker—no skipping, tugging, flaking, or smudging—and is sweat-, humidity-, and transfer-resistant.