The Venture Gear Overwatch protective eyewear was designed to be used for extended periods of time while still maintaining the best protection possible. The Overwatch is sunglass inspired style with metal hinges. It also features rubber temple tips and soft nosepieces, providing a comfort for all-day use. Additionally, the Venture Gear Overwatch safety glasses should last you a while as its lenses are scratch resistant polycarbonate which also prevent fogging and protect the wearer from 99% of UV rays. These lenses are extremely tough, as they comply with ANSI Z87.1, EN166, and MIL-PRF 32432 (ballistic) requirements.