What it is: A long-wearing, soft-tipped brow pen. What it does: Anastasia Brow Pen glides on easily, clinging to both skin and hair, for a lush and natural loo k. Use it as a base to increase your current brow makeup's staying power or to fill in sparse areas for a fuller look. What else y ou need to know: It dries quickly, lasts all day, and its water-based formula is easily removed with soap and water.