The Brow Duo's thin and dense bristles allow for a precise application and easy product pickup. The angle of the brush helps to get a close and neat application of powder within the brow, allowing for sculpting and shaping of both natural and dramatic looking eyebrows. The spoolie on the other end of the brush can be used to brush and groom brows prior to applying product as well as combing the product through the brows for an even application. Bristle Profile: High Grade synthetic fibers, Incredibly durable, Indefinite lifespan with proper care, Can be used with liquid, powder, and cream cosmetics