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 by Fisher Pen Company. 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 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 cartridge.
NOTEBOOKS: The most ideal pen for All-Weather Notebooks.