Flak jackets are made out of Kevlar brand fiber, which is a fiber five times stronger ounce for ounce than steel, but about half the density of fiberglass. It is the same material out of which bulletproof vests are made.

Day 1Edit

Jack Bauer tricked Ira Gaines into thinking he had killed Nina Myers, when he actually put a flak jacket on her, saving her life.