The Anastasia Beverly Hills Brow Pen allows you to build dimension by micro-stroking in areas where you desire more fullness. The waterproof formula glides effortlessly onto the skin with a feather-light feel, creating unparalleled, hair-like details with precision that mimics the appearance of natural hair and produces a fuller-looking finish. The superfine tip is perfect for creating realistic hair strokes, ensuring the most natural eyebrows you've ever had.