The Rite in the Rain All-Weather Spiral Metric Field Notebook is a weatherproof spiral field book printed with 2x2mm grid squares and 10mm accents. These grid patterns on the notebook pages are most useful for those in the tactical, education, surveying, marine, and engineering industries. The sturdy Rite in the Rain paper of this notebook won't tear, expand or float away when exposed to rain, snow, sleet, mud, and grease. It is made of Polydura covers, water-resistant Rite in the Rain pages, and bound together with Wire-O side binding. Use ball-point pens, pencils, crayons, markers, and Rite in the Rain pens for secure field notes that will last for years in storage. The Rite in the Rain Spiral Metric Field Notebook has 64 pages/ 32 sheets and is convenient to carry around, weighing only .2 lbs.