A color cover that is convenient for different purposes. Uses a cloth laminated with a special film. Not only is it hard to tear the back, but it is also a specification that allows you to write with a ballpoint pen. A highly functional cover design with a space for writing titles and names. Triangular memory points are placed at the center and both ends so that vertical lines can be drawn accurately. It is an environmentally friendly product that uses forest certified paper for the inner paper.