Revere Men's Care Precise Beard Pen is an easy to use, long lasting waterproof pen that’s guaranteed & designed to give your beard a natural appearance by contouring & restoring your hair line, gaps, and thinning areas. Achieve that clean and sharp lined beard with Revere's precise beard pen! Fill in gaps and desired areas by contouring and defining in the direction of hair growth, then brush applied areas to blend and naturalize desired area. Guaranteed to give your beard that clean and sharp look while reducing the appearance of gaps and problem areas.