Liberty Mountain Birder's Field Notebook WEATHERPROOF PAPER: 64 pages / 32 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. PAGE PATTERN: Sketch, fill in information, and place photos in the fill in the blank page pattern on front and the notes section on the back. WIRE-O BINDING: Tough impact-resistant Wire-O binding won't lose its shape in your back pocket or pack. 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.