2009: Nike Air Zoom Katana Racer 3
Runner: Deriba Merga
About the Shoe: The Katana Racer 3 had an outsole of little rubber dots, which helped keep weight to a minimum. It's no longer available, but another insanely light shoe Nike currently builds is the Flyknit Racer. It has a "waffle outsole," which basically limits rubber to the forefoot and heel, and is designed to give maximum traction without weighing the shoe down.