Fisher Space Pens are the official pens used by NASA's astronauts, and were built for use under extreme circumstances such as gravity-free zones.  Pioneering in technology, the Trekker Space Pen can hang upside down forever, yet function immediately when needed. A keychain ring attached to the posi-lock cap allows for easy accessibility.

The Trekker comes with a carabiner and a break-away lanyard, making it easily attachable to a belt loop, backpack, climbing gear, or anything else within your reach.

• Writes underwater or over grease
• Writes from -35 to +121 °C
• Writes upside down or floating in a gravity-free zone
• Rubber Comfort Grip™
• Length: 11.8 cm