Bulletproof glass is a type of strong, transparent material designed to resist penetration from bullets and other projectiles. It is typically made by layering multiple sheets of glass and plastic, which absorb and disperse the energy from impacts. The thickness and composition of the glass can vary depending on the level of protection required. This specialized glass is commonly used in security applications, such as in banks, government buildings, and vehicles like armored cars. While it can significantly reduce the risk of injury from gunfire, no glass is completely impervious to all types of bullets, and its effectiveness depends on the specific design and materials used.