NASA selected Fisher Space Pen for use on all Apollo missions. x000B _ _ saw in Guinness World Records as "Most Versatile Pen." _ x000B _ that The Fisher Space Pen continues to write in the rain and all other conditions. _ x000B _ of time used by outdoorsmen. _ x000B_Writes in all environmental conditions: on coated paper and plastics, through the water and underwater and in extreme climatic conditions. Not affected by dirt, grease or cold. Completely Made in the USA!