This is a precious eyeliner with an Asian calligraphy-inspired brush precisely and effortlessly draws lines combines fine-particle carbon black with a supple brush, helps to create a strong line along any eye shapes for a stunning effect waterproof. 100 Percent authentic product. Dermatologist tested. This is a precious eyeliner with an Asian calligraphy-inspired brush precisely and effortlessly draws lines combines fine-particle carbon black with a supple brush, helps to create a strong line along any eye shapes for a stunning effect waterproof.