"Meet the original outdoor pen: the Rite in the Rain All-Weather Pocket Pen. This cutting-edge pen is perfect for those that must take notes or even sketch in the outdoors in adverse conditions. This unique, all-weather pen is able to write on wet paper, and its proprietary ink and delivery system writes without skipping in extremely wet conditions. How does it do this? Its special ink cartridge is pressurized, so it'll even write underwater up to 35 ft. or upside down. The cartridge is so well built, the ink won't ever leak, evaporate, or make a mess in your pocket. This ink pen performs in temperatures as low as -30F to temps as high as 250F. Diameter: .44"". Length (with cap off): 3.25"". Length: (with cap on): 5.25"". 2-pack. Perfect for taking notes or sketching in the rain Able to write on damp or wet paper Special, pressurized ink cartridge Pen can write upside down Won't leak, evaporate, or make a mess Writes in temps from -30F to 250F"