Rite in the Rain All-Weather Retractable Pen (Black)

The ink and delivery system used exclusively in Rite in the Rain cartridges will write without skipping in extremely wet conditions far better than other comparable weatherproof pens, tiny pockets in the pen's tip delivers ink in the worst conditions without allowing water or air back into the cartridge. The pressurized ink writes in temperatures from -30F to 250F, underwater (up to 35 ft), and at any angle.