WRITES THROUGH: The permanent ink writes through water, grease, and mud without clumping or smearing.

PRESSURIZED CARTRIDGE: All-Weather cartridge is manufactured in the USA. The pressurized ink 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 weatherproof pens.

INK DELIVERY: Tiny pockets in the pen's tip will deliver ink in the worst conditions without allowing water or air back into the pressurized cartridge.