011 Traveler's Notebook Passport - Refill - Binding Bands
The Binding Bands allow you to keep more than two notebooks in your Passport size Midori Traveler's Notebook at the same time. Maybe you want to keep one notebook for sketching, one for notes, and one for your calendar. With the binding bands you can add up to four additional notebooks, pockets, or folders. Each pack contains 4 bands: 2 brown and 2 black.