Rite in the Rain 3×5

Rite in the Rain has been making all-weather paper since 1916, and the 3×5 is their EDC staple — 100 waterproof pages under a Polydura cover that handles mud, rain, and pocket sweat. The 3" × 5" format fits in a back pocket or cargo pocket without folding. Works with pencil, Fisher Space Pen, or any pressurized ballpoint. If your notebook lives in your pocket rather than on a desk, this is the one.