MAC Brushstroke Eyeliner - Brushblack 1.8ml MAC Brushstroke 24-Hour Liner in Brushblack is a popular liquid eyeliner pen known for its precision brush tip. This eyeliner is designed to create sharp, clean lines with ease, whether you prefer a thin or bold look. MAC Brushstroke 24-Hour Liner in Brushblack offers long-wearing performance for up to 24 hours with easy and precise lining. It features rich, intense color that is smudge-proof, transfer-resistant, and water-resistant. Additionally, it is sweat- and humidity-proof, ensuring durability in various conditions. Tested by ophthalmologists, it is safe for contact lens wearers and can be easily removed with warm water. How to Use: Apply directly to lash line.