What is the Roller Brow Defining Pen? With Genuist Beauty’s Roller Brow Defining Pen, say goodbye to brow gaps and imbalances in an instant. This natural-looking liquid brow stain helps cover sparse areas where skin shows through, blending seamlessly with your natural brows. The ceramic ballpoint tip glides easily across the brow area, letting you create precise, hair-like strokes with ease. Formulated with clean ingredients, the stain is blendable, buildable, waterproof, smudge-proof, and lasts all day. Perfect for quick touch-ups, this lightly pigmented, waterproof pen helps naturally disguise brow gaps with long-lasting results. Unlike most brow pens, pencils, pomades, and powders that create harsh, unnatural lines, the Roller Brow Defining Pen delivers a soft, natural-looking brow stain. The ceramic ball tip delivers color precisely where you want it, giving you brows that look naturally full and well-defined.