Product Description and Features:

Marker Tip: The most defining feature is its felt tip, which is designed to make drawing a precise line as simple as using a marker or pen. This is particularly helpful for beginners or for creating sharp winged eyeliner looks.

Formula: It is generally advertised as a long-lasting, smudge-proof, and waterproof liquid eyeliner. The formula is often highly pigmented, delivering a rich, intense black color in a single stroke.

Convenience: The pen format makes it very convenient and easy to handle.

Common Variants: The product may come in different versions, such as "MN Matte Waterproof Eyeliner" or "MN Liquid Eyeliner," but they all share the marker-style applicator.