Product details Anastasia Beverly Hills Brush 15 is a travel-size, flat angled brush featuring synthetic fibers and is ideal for filling in and precisely defining brows with powder and emollient-based products. How to use Dip Brush 15 into your favorite powder or emollient-based brow product (works best with Brow Powder Duo and DIPBROW® Pomade) and begin defining the lower arch of the brow. Then, fill in the tail end, moving from the arch to tail. Finish by lightly detailing the front of the brow in the direction of hair’s natural growth.