Flak Jacket

Overview
"Flak Jackets were used as far back as World War II, to provide pilots with protection from Anti-Aircraft flak rounds. While rather weak on their own, manufacturers have used modern techniques to greatly augment the strength of these jackets, by adding mainly metal or ceramic plating into these vests. The plating makes the jackets substantially heavier, and users have to be physically fit to an extent, in order for it not to hinder movements. Strangely, there seems to have been a revival in these obsolete jackets."