Glossier Brow Flick microfine detailing pen in black More brow for your brow. What it is: A brush-tip detailing pen that fills in and defines brows WHY IT'S SPECIAL Fills and defines the brow arch, extends the tail, and adds depth to sparse areas The pen’s brush-tip creates featherlight strokes that actually look real Begin with clean brows—a fresh, dry surface makes it easier to use Brow Flick. Shake the Brow Flick pen at a downward angle. Find a starting point where your brows are more sparse, then begin to etch lightly anywhere you'd like added dimension or definition. Leave to dry for 15 seconds or more. cute sleek packaging