Rite in the Rain's pocket-able EDC pen writes no matter what. It writes when the paper is wet. It writes upside down. It writes down to -30F. If you forget it in your pocket and it tumbles in the wash, it will write afterwards. It just writes. So if you need a pen that works no matter what, pick up the Rite in the Rain All-Weather Pocket Pen. Measures 3.25" Closed, 5.25" Open, .4375" D. Black ink, point size .8 mm.
Sold in a 2-Pack.