Rite in the Rain Metal Portage Pen - Wherever you wander, this heavy-duty portable pen is your ideal travel companion. Small enough to fit in your pocket yet powerful enough to withstand the elements. Let the adventure begin! Features Machined brass barrel gives a premium, weighted feel. Perfectly balanced construction at full size, yet easy to pocket when closed. Proprietary ink and delivery system used exclusively in Rite in the Rain Pens will write through water, sweat, grease, and mud. There are no boundaries with this pressurized ink cartridge. Performs in temperatures from -30F to 250F, under water (down to 35 ft), and at any angle.