L'Oreal Paris Brow Stylist Up to 48HR Wear Micro Ink Pen, Blonde, Get precise, defined natural-looking brows with our micro ink pen by brow stylist. This instant Longwear tint pen precisely tints brows with its comb tip applicator for a natural-looking, hair-like effect. The formula lasts up to 48 hours, it is waterproof, smudge-resistant, does not transfer and color does not fade.