Leuchtturm 1917 Outlines Weatherproof NotebookNotebook with waterproof paper & water resistant cover Whatever the weather, with Outlines youll always be able to read what you write. It features the same durable, wet strength paper made in Germany used to produce nautical charts. This means smooth sailing when you put your pen to the excellent pages. Leuchtturm will help you get organized; the blank table of contents and page numbers will make leafing through your notes easier than ever before.