
The genuine leather book cover is made of Tochigi leather. The thickness of the leather is as solid as about 1.5 mm. The book cover has a thread for attaching the original bookmark, so you don't have to worry about dropping the bookmark. When not in use, it can be removed for use. -Classic series: Uses Nume leather that has both firm hardness and moist softness. Finished with a technique called "oil pull-up" that is oiled, you can enjoy a natural shine with a texture and a smooth feel.