With a pressurized ink cartridge, the metal Filson x Rite In The Rain Clicker Pen performs in temperatures from 30 below to hotter than boiling, on wet paper or dry, even up-side down. Made to work with Rite in the Rain paper, or any other paper for that matter. Built tough to prevent leaks in your pocket, pack or briefcase. Black ink. Pocket clip keeps it ready at hand.