Pencils Will Work Great On Rite In The Rain But Sometimes You Just Need A Pen. This All-Weather Metal 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 5 1/4" Long, With A Barrel Diameter Of 3/8". Black Ink.