*The permanent ink writes through water, grease, and mud without clumping or smearing. This all weather belt clip pen survives splashes, stains, and smudges. *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. *The oversized clip attaches to pants, pockets, and belts and can quickly be retrieved on the job site or in the field. *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. *Neon Orange, You Drop it, You find it! Don't let leafs and brush stop you from retrieving your pen!