mark+ uses a special highlighter ink that is easy on the eyes, and is ideal to use to outline letters to define them and bring them to the forefront. This highlighter is an extra fine pen with a dark ink colour that is well suited for use on important notes or memos. This two way highlighter makes two different kinds of markings from one pen, making it a streamlined item that won't take up extra room in your Pen / Pencil Case. Made in Japan. Marker 2-Way