What It Is: A slim, finely tapered brush with firm bristles for flawless and precise lining. Ideal for use with Bobbi Brown's best-selling Long-Wear Gel Eyeliner formula, as well as powder liner formulas. Why It's Different: Firm, densely-packed bristles offer the ultimate precision and versatile, wet-dry lining with gel and powder formulas. How to Use It: Dip the tip of brush into gel or powder eyeliner and apply as close to the lash line as possible. Reapply for a thicker line, if desired. For wet lining, dampen brush slightly, then pick up powder formula. Bobbi Brown Ultra Fine Eyeliner Brush