A bestselling brow pencil to transform shapeless, undefined brows with a few strokes—now available in 12 shades to flatter every hair color. What Else You Need to Know: Precisely, My Brow Pencil's ultra-fine tip makes adding definition to brows easy. It lets you draw incredibly natural-looking, hair-like strokes that last up to 12-hours. This rich, waterproof eyebrow pencil is ideal for spot-filling sparse or over-tweezed areas, and the smudge-proof formula is firm for precise application.