500 pack solar eclipse glasses made by aas approved factory,ce and iso certified eclipse shade for direct sun viewing, White;black

manufactured in the usa by nasa-approved manufacturer: this implies that the glasses are produced under stringent quality standards and have the approval of nasa, a well-respected space agency. iso-compliant: the fact that these glasses are recognized as iso-compliant by the american astronomical society means they adhere to international safety standards for viewing the sun during an eclipse. optimized design: the glasses use scratch-resistant silver polymer lens material with an optical density of 5 or greater. they provide protection against harmful ultraviolet and infrared rays, as well as intense visible light. this combination ensures safety and comfort for eclipse viewers. upcoming eclipses: you've also provided information about two significant solar eclipses in 2023 and 2024. these glasses are recommended for safely viewing these rare celestial events. in summary, eclipse glasses from american paper optics appear to be a reliable and safe choice for anyone looking to witness solar eclipses. their certifications and features make them a trusted option for eclipse chasers and enthusiasts..syi