The basics Our unique brow setting formula has natural brow extension fibers that adhere to each hair for an instantly fuller looking brow. The benefits Chamomile and Allantoin strengthen, add shine, and soften course hairs. The uses Works alone to tame brows or over brow pencil or powders to set color and shape.  The bottom line The unique precision brush coats and texturizes individual brow hairs while fine fibers fill-in and plump, leaving your brows with a fuller, healthier look.