2mm grid notebook that ages like fine wine. This is the second "String-tie notebook" release. Features highest Japan quality Tochigi leather on cover that will get better with age. Pages made with highest quality paper in Japan, "OK Fools". OK Fools paper allows the pen to glide on the paper, offering great ink absorbability which makes this book have great chemistry with fountain pens. The paper also has sunemo texture and see-through features which can only be found in high quality paper. The end of the notebook comes with double sided pockets.