18MM Round Saint Christopher U.S. Air Force medal cast in solid 14 karat yellow gold. Saint Christopher is the patron saint of travelers and is worn by U.S. Air Force men and women for protection. The words “Saint Christopher Protect US” encompass the medal. The front of the medal is a United States Air Force medal. The back of the medal is a Saint Christopher “Protect Us” medal. The medal weight is 1.44 DWT (2.24 grams).