The reading ribbons of X17 are also well thought out: The length and way of placing ensures that one physical ribbon gives you two bookmarks.
Number of pieces per package: 3 pieces.
The X17 reading ribbon is made from natural fibers. No synthetic ribbon.
With a reading ribbon you can remember where you left off or mark which pages you find important. The reading ribbons are extra long so that you can pull them under the elastic of one paper filling and then pull them up to create two reading ribbons.
An extra tip: you can protect the ends of the reading ribbons against splitting with a little glue. Don't do this with a lighter, because the X17 reading ribbons are made of natural fibers and not plastic.