Rite in the Rain Weatherproof Side Spiral Notebook, 4.625" x 7", Yellow Cover, CERT Field Operator's Guide FOG (No. 573) WEATHERPROOF PAPER: 96 pages / 48 sheets per notebook. This paper that wont turn to mush when wet and will repel water, sweat, grease, mud, and even survive the accidental laundry mishap and more. WIRE-O BINDING: Tough impact-resistant Wire-O binding won't lose its shape in your back pocket or pack. REFERENCE DATA: CERT Reference Material printed on wood-based recyclable paper. WHAT TO WRITE WITH: Use a Pencil or All-Weather Pen and your notes will stay intact. Standard Ballpoint pens will work when paper is dry. Water-based inks will bead off Rite in the Rain sheets. WATERPROOF POLYDURA COVER: Our most flexible cover material that will defend your field notes from scratches and stains.