This eyeliner is designed to provide long-lasting, intense color and definition to your eyes. The ColorStay Eyeliner is formulated to be smudge-proof and fade-resistant, allowing it to last throughout the day without smudging or smearing. It typically comes in a pencil format, making it easy to apply with precision. To use the Revlon ColorStay Eyeliner, you can apply it directly along your lash line. The creamy and smooth texture of the eyeliner pencil allows for easy and precise application. You can create a thin and subtle line for a more natural look or build it up for a more dramatic effect.