Introducing Infallible 24H Brow Filling Triangular Pencil, L'Oreal's retractable brow pencil for perfectly defined, fuller looking brows. Available in a large shade range, so you can find your perfect match for natural-looking brows. Brush your brow hairs upward and into place, to open up the eyes. Begin your application from the inner corner of the eye, lightly brushing colour in small strokes. Finish using the sharpest edge of your Brow Filling Triangular Pencil, to create a clean finish.