The Rollbahn Flexible allows you to freely change the pages.  The cover is made of highly transparent clear material. The cover has a pocket which allows further customization by including photos, postcards, etc.

refills included:

○ Memo Assortment (16 sheets), TO DO Refill (5 sheets), Slit Reinforcement Sticker (1 sheet), PP Pocket (1 sheet)
○ Refills can be replaced
○ Optimal number of refill sheets: 40 sheets

Spiral format allows the notebook to be used while standing or in a limited space. The refills inside can be removed and replaced from the four rings at the top and bottom of the main body with slit ring holes. To remove them from the rings, pull up either the top or bottom end of the refill vertically, about three sheets at a time, to remove them from the rings.

The included refills are "THINK," which has a highly flexible grid and a vibrant design that is useful for jotting down ideas and organizing thoughts. The set includes 16 "Scale Refills" with designs featuring 1-4 divisions, 2mm grid, 5mm grid, and 10mm grid, and 5 "TO DO Refills" that allow you to organize tasks while checking your written notes. In addition to the refills, there is one reinforcement sticker to reinforce the refills without interfering with the pages, and one PP pocket for carrying stickers, sticky notes, etc. The notebook has a detachable front and back cover, eliminating the need for a spine. Like a ring binder, the cover can be folded 360° for compact use. Its design makes it ideal for use in limited spaces, such as a desk at home. 

Size 'large' (5.5"x7") - similar to B6. Made in Japan.