Security ... think about it!
The feat began with a 5-dollar package of plain, white T-shirts purchased at Wal-Mart, which the scientists cut into thin strips. They dipped those white cotton strips into a black solution of boron. After an hour, the strips were removed from the solution and baked in at oven at more than 1,000 degrees Celsius (1832 degrees Fahrenheit) for an hour. The heat stripped away anything that wasn’t carbon or boron, and combined these two elements into boron carbide. The resulting fabric is very different than the original materials that at the start of the process—it’s lighter, stronger, tougher and stiffer than the original cotton, but it can still be bent, unlike normal boron carbide armour plates.