Rite in the Rain Weatherproof Hard Cover Notebook, 4.75" x 7.5", Yellow Cover, Environmental Pattern (No. 550F) Repels water, sweat, grease, and mud The cover, the paper, the sewn-in pages, even the glue is Designed to survive mother Nature's wrath. Use Pencil or all-weather pen (no gels or water-based inks) Archival quality paper and will last several hundred years Wood-based recyclable paper