The MD Notebook is designed for comfortable writing. It opens flat and is designed for functional beauty with no frills. It is made of MD PAPER (MIDORI Diary Paper). which has been developed for comfortable writing with a variety of writing instruments. from fountain pens to pencils. Not only its pages. but the cover and flyleaf are also made of MD PAPER for the ultimate comfort during writing. This is a 7mm lined type. with a thicker central line so that it can be used separately at the top and bottom.