Liquid eyeliner comes in a variety of packaging formats and different formulas. It can be applied with a brush or pen. Some formulas are waterproof, while others are not. Choose one depending on how long you want your liner to stay on and how you plan on removing it.
Felt tip: Many liquid eyeliner pens have a felt tip, which makes them easier to apply. They are also available in a variety of thicknesses, from thin to thick. Some are double-sided, for more flexibility. They also come in different shades.
Liquid eyeliner formulas can create a bold, defined style. They are typically waterproof, so you don't have to worry about them smudging or fading. Choose a liquid eyeliner formula that suits your needs and your application skills. For the best results, choose a highly pigmented formula.