This pack comes with a set of 8 elastics for your Midori Traveler's Notebook: blue, yellow, green, gold, orange, brown, red and black enabling you to change the appearance or replace old elastic on your notebook. You can even replace the rubber on the leather cover that holds the notebook or the rubber band that holds the cover. The kit is of great to have handy in case your rubber band breaks, or just if you'd like to customise your notebook.