The Fisher Space Pen Backpacker pen writes in extreme temps from -30°F to 205°F. And it writes underwater, upside down, at any angle, over grease and for 3 times longer than most pens.
Features
Internal pressurized refill has a 100-year shelf life
Anodized, aerospace-grade 6061-T6 billet aluminum and brass construction
Keyring cap; black finger-grip and trim
Each Fisher Space Pen is precision assembled and hand-tested