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! Specifications Overall Size: 5 1/4" (Open), 3 3/4" (Closed) Barrel Diameter: 3/8" Ink: Black Weight: .05 lbs