Battle Factory Season 1 Episode 5 A Helmet, a Zippo, a Fuel Bladder, and a Simulated IED

When a series of delicate snowflake shaped sheets of Aramid are pressed together, they'll form a piece of headgear that's comfortable enough to wear to war, and tough enough to take a bullet. Up until the mid-90's, helmets hadn't evolved that far from the steel doughboy helmets of World War 1.