Rite in the Rain All-Weather Pen Refill

Functions in extreme conditions. The pressurized ink cartridge writes upside down and through moisture without smearing or washing off.  WRITES UPSIDE DOWN Pressurized ink cartridge performs in temperatures from -30F to 250F, under water (up to 35 ft), and at any angle. INK WON'T SKIP Proprietary ink and delivery system used exclusively in Rite in the Rain Pens will write without skipping in extremely wet conditions. WRITES THROUGH Permanent ink writes through water, sweat, grease, and mud without clumping or smearing.