Thickness effect. You have fine, irregular eyebrows and simply look badly the Nanobrow eyebrow serum will add density and provide volume in a few weeks. Strengthening and repair. Nanobrow's eyebrow serum improves the core of eyebrow hair, increasing hydration, nutrition and strengthening levels. Repair the eyebrows and keep them healthy so that they look full and with volume. Fabulous eyebrows without makeup. With Nanobrow, you will not have to apply any eyebrow makeup product. This serum darkens, densifies and brights to the eyebrows. Enhance and enhance the beauty of your eyebrows.