Bulletproof vest

A bulletproof vest, also known as a ballistic vest, is a specialized form of body armor. It is designed to protect the human torso from harm. Specifically, these vests work to absorb the impact of projectiles. They prevent the penetration of firearm bullets and explosion fragments.

This protection is vital for many people in dangerous roles. Police officers and security personnel often rely on these tools for safety. Soldiers use advanced versions to survive combat environments. By absorbing energy, the vest acts as a shield for the body.

The mechanism of protection depends on whether the vest is soft or hard. Soft armor uses many layers of material to catch a projectile. For example, Korean inventors found that ten layers of cotton could stop bullets. Hard armor uses rigid components like metal or para-aramid fibers. Some advanced designs even include ceramic inserts to stop high-caliber rounds. These inserts are meant to break apart the bullet upon impact. Additionally, trauma plates are used to manage the blunt force of a hit.

There are distinct types of armor used for different threats. Soft ballistic vests are often used by prison guards or police. They are flexible and protect against stabbing or light projectiles. Hard armor is typically used by tactical units and soldiers. This type can be worn alone or combined with soft armor. Harder versions include steel plates or ceramic inserts for rifle ammunition. Some historical versions, like the English Civil War cuirasses, used two layers. The outer layer absorbed energy, while the thicker inner layer stopped penetration.

The history of ballistic protection spans many centuries. In 1538, Duke Francesco Maria della Rovere commissioned a special vest. In 1561, Holy Roman Emperor Maximilian II tested armor against gunfire. During the 1860s, Kim Gidu and Gang Yun developed cotton vests in Korea. In 1880, Ned Kelly and his gang used stolen plough mouldboards for armor. This heavy suit protected their heads, torsos, and legs. During a gunfight, Kelly survived at least 18 bullets striking his armor.

Scientific discoveries helped improve armor in the late 19th century. In 1881, Dr. George E. Goodfellow observed silk stopping a bullet. He saw a silk handkerchief in a pocket prevent penetration. This led to the development of silk vests using 18 to 30 layers. By 1914, these silk vests cost US$800 each. Polish inventor Jan Szczepanik also created a silk vest in 1901. This vest saved the life of King Alfonso XIII of Spain.

World War I and World War II saw massive shifts in armor technology. In World War I, the Germans issued Sappenpanzer, or "Lobster armor." These were nickel and silicon steel plates used by sentries. The British also experimented with silk and cotton necklets. During World War II, the United States developed vests using doron. This was a fiberglass-based, fiber-reinforced plastic. These vests were used during the Battle of Okinawa in 1945. The Soviet Union produced the SN-42, a steel breastplate weighing 3.5 kg.

Modern body armor continues to evolve through advanced materials. In the interwar period, gangsters wore cotton padding to stop handguns. However, law enforcement responded with more powerful cartridges like the .357 Magnum. This competition drove the need for better protection. Today, technology like the Improved Outer Tactical Vest (IOTV) is used by soldiers. These systems integrate various layers to handle complex threats. From silk to advanced ceramics, the goal remains protecting the wearer.