MAC Cosmetics Pro Brow Definer, 0,3 g, Eyebrow Makeup for Women. Shape and style your brows to perfection with the MAC Cosmetics Pro Brow Definer eyebrow pencil. It allows you to outline, define and fill in any sparse areas, giving your eyebrows a denser, voluminous appearance and the desired shape. This helps accentuate the natural beauty of your facial features. Characteristics: highlights eyebrows and emphasises their natural beauty, provides precise eyebrow styling in moments, creates a natural effect, the product is waterproof, long-lasting effect, includes a practical brush. How to use: Use the pencil tip to define the eyebrow contours and fill in the gaps for a thick, natural look. Finally, brush the brows with a brush to blend out the lines.