Features: 1. **Long-Lasting Formula**: Our black eyeliner features a unique color-locking formula that ensures your eye makeup stays vibrant and intact throughout the day, resisting sweat and oil for all-day wear. 2. **Smudge-Proof & Water-Resistant**: Enjoy a flawless look with our smudge-proof and water-resistant eyeliner, designed to withstand humidity and tears, keeping your eye makeup looking fresh and perfect. 3. **Easy Application**: The eyeliner is designed for effortless application. Simply sharpen the pen tip for precision and draw smooth, defined lines along your eye contour with ease. 4. **Versatile Use**: Perfect for creating a variety of looks, from subtle everyday styles to bold, dramatic eyes. This eyeliner adapts to your makeup needs, making it a must-have in your beauty kit. 5. **High-Quality Ingredients**: Formulated with premium acrylate copolymers and ethylene glycol, our eyeliner is safe for sensitive eyes and provides a rich, deep black color that enhances your natural beauty. Our black eyeliner is carefully formulated from acrylate copolymers and ethylene glycol. Designed specifically to enhance water resistance and the longevity of makeup. The usage method is extremely convenient: Sharpen the pen tip before use to ensure it is sharp enough. Gently draw lines along the contour around the eyes to create delicate eye lines. Easily draw smooth eyeliner with a clear contour that is not easy to smudge. And it has a long-lasting color-locking formula, which can prevent sweat and oil and is not easy to cause makeup to come off.