3M SecureFit Self-Adjusting Safety Glasses with pressure diffusion clear frame allow temples to naturally adjust to individual head sizes and does not slip even while the person is moving. Glasses feature clear polycarbonate anti fog lens for long lasting durability. Anti-fog coated lens absorbs 99.9% UV and helps to keep lenses free of moisture in hot and humid condition. Self-adjusting feature eliminates need to stock multiple frame sizes at worksites. They meet all requirements of CSA Z94.3-07 and are impact rated to ANSI Z87.1-2010.