Nasa and ISO approved. Do not be fooled by fake solar filters that will be harmful to your eyes. Celestron is a leading manufacturer in telescope lenses. These glasses were made for Celestron by American Paper Optics. SOLAR SAFE FILTER TECHNOLOGY:Filter conforms to the ISO 12312-2:2015(E) international safety standard for filters for direct viewing of the Sun. The ideal tool for viewing eclipses, sunspots, or the Sun any day! ONE-SIZE-FITS-ALL GLASSES: These paper eclipse glasses feature two different folding points to accommodate a variety of face shapes and sizes. SOLAR FILM MADE IN THE USA: Celestron Solar Safe film is produced in the USA by American Paper Optics, one of the suppliers recommended by NASA and the American Astronomical Society for safe solar viewing, and has been independently tested by a third-party lab. NATURAL ORANGE TINT: EclipSmart glasses reveal the Sun in the visible (white light) spectrum, but we’ve added an orange tint for a more natural look and a comfortable observing experience. N