Rite in the Rain is truly waterproof paper. You can even write on it underwater! I tested their Field Binder. They also make binders and paper for many other uses. The paper comes in several templates: Universal Grid paper, CAS  Briefing Form (9 Line), Standard Range Card, Call for Fire, Warning Order, Soldier’s Personal Data, MEDEVAC  (9 Line), and UXO/IED  Report (9 Line). The grid paper is useful for writing and graphing/mapping.
Field Binder Design: The green plastic binder measures 7 3/4″ x5 3/4″x 1″ with six snap rings. It has an inch ruler and a standard/metric conversion table inside the front cover. The back cover has a centimeter ruler and a clear plastic storage pocket. The paper measures 7″ x 4 3/4″. The binder provides 1/4-inch protection around the sheets, but is open at the top, bottom, and sides.
Performance: The paper will accept writing from ballpoint pens, pencils, and “space” (pressurized) pens when underwater, wet, and dry. New paper dries nearly instantly, the water beading and running off. After being soaked for12 hours the paper is slightly weaker and stays damp for half an a hour, but still works fine. The grain is vertical so it does not rip out of the binder easily. The loops on the binder are sturdy, although they might be jammed by coarse sand.
Recommendation: A highly recommended product, especially if you live in a damp climate or on the water. It is ideal for field tactical operations, or for something as mundane as leaving a note on someone’s car window (pinned under their windshield wiper). If you can afford to, buy one for each of your vehicles and each tactical or G.O.O.D.  pack. Rite in the Rain field binders and refills are available from Ready Made Resources  and several other Internet vendors. (Reviewed by #1 Son–A 13 year old Home schooled kid.)