The Oakley SI Ballistic M Frame 2.0 PPE protects from sand, wind, and dust. It will sit comfortably on your head thanks to the Hydrophilic Unobtanium™ Nosepad. In addition, you will have a crystal clear field of view thanks to the distortion-free high definition lenses. They also have an anti-fog lens coating, making them versatile in any environment. The bridge has a clip to securely affix the lens to the frame to ensure safety at all times. While still prioritizing safety, the frames surpass the ANSI Z87.1 Industrial Standards for high-mass and high-velocity impact protection. They also meet the MIL PRF-31013 Rated. If you like the Oakley SI Ballistic M-Frame 2.0 PPE, check out our entire Oakley Prescription Safety Glasses line for more options.