ASTM or The American Society for Testing and Materials, is a group that publishes protective eyewear standards. Their requirements are very strict, so any glasses marked with ASTM F803 will be impact resistant and able to protect your eyes while playing a variety of sports. To be certified as High Velocity Impact Resistant, as part of the ASTM F803 Standard, the frame and lens must withstand the impact of a 40 – 65.1 mm projectile fired at 150 km/h. For more information, see our blog article (https://www.rx-safety.com/2019/12/what-does-the-eyewear-designation-astm-f803-stand-for-and-why-is-it-important/)