What is flak vest vietnam?

Flak vests were heavy-duty protective vest worn by soldiers in the Vietnam War to protect them from shrapnel and bullet fragments that could be caused by explosives and artillery shells. Flak vests were made from multiple layers of Kevlar or nylon fibers that were woven together to create a thick, bulletproof fabric. Vietnam War-era flak vests weighed around 8-10 pounds, were known to be incredibly uncomfortable and unwieldy, often hindering mobility. Flak vests were different from body armor in the sense that they were not bulletproof but rather provided protection against shrapnel and other debris caused by explosions. Despite their shortcomings, flak vests were considered essential gear for combat troops in the Vietnam War, and their use greatly improved the survival rate of many soldiers.