Here are three points about the smooth eyeliner that is easy to color, waterproof, quick-drying and long-lasting: 1. Smooth and easy to color: This eyeliner pen has a smooth texture, making it easy to draw delicate eyeliner. Its unique pen core design ensures a smooth writing feel, easily fills the gaps between eyelashes, and makes eyeliner natural and beautiful. 2. Waterproof and quick-drying: This product adopts advanced waterproof technology, ensuring long-lasting makeup even in damp environments. Meanwhile, its quick-drying feature enables the eyeliner to set the makeup quickly, avoiding smudging and keeping the eye makeup clean. 3. Durable and long-lasting: This eyeliner pen has excellent durability, maintaining the makeup effect for a long time. Its unique ingredients make the eyeliner less likely to fade, and it can maintain its original color and lines even after long-term wearing. In addition, this eyeliner pen weighs only 3g, is lightweight and portable, and is convenient for touching up makeup at any time. Notes Please ensure that your eyes are dry and clean before use for the best results. 2. If allergic reactions occur, stop using it immediately and seek medical advice. Please store in a cool and dry place, away from direct sunlight and high temperatures. I hope this description meets your requirements.