What it is: A double-ended matte and shimmer highlighter. What it does: Anastasia Brow Duality pencil features a matte highlighter on one end and a shimmer highlighter on the other. Use the Matte side during the day to create a soft highlight. For those nights on the town, use the Shimmer side to give your eyes that soft, satiny glow. Its silky formula is enriched with vitamin E and contains light-diffusing pigments to even out skintone.