Rite in the Rain All-Weather Durable Clicker Pen – Black Ink (No. 93K)

Amazon.com Price: $12.95 $11.36 (as of 05/01/2018 14:35 PST- Details)

WRITES THROUGH: The permanent ink writes through water, grease, and mud without clumping or smearing.
PRESSURIZED CARTRIDGE: All-Weather cartridge is pressurized, writes in temperatures from -30F to 250F, under water (up to 35 ft), and any angle.
PROPRIETARY INK: The ink and delivery system used exclusively in Rite in the Rain Refills will write without skipping in extremely wet conditions far better than other comparable all-weather pens.