The ultimate Every Day Carry, this tough little lightweight pen is designed to survive daily abuse and keep writing. A stout barrel, burly clip, and a dependable bolt-action mechanism makes this pen your trustworthy ride-or-die companion. This All-Weather Pocket Pen writes on wet paper and upside down, the pressurized ink cartridge performs in temperatures from -30F to 250F. The ink won't leak, evaporate, or blow up in your pocket, nor will the bolt-action mechanism allow your pen to accidentally open in your pocket. Black Ink. Refill cartridges available. Rite in the Rain Weatherproof Black Mini Bolt-Action Pen - Black Ink, 2 Pack