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.