Absolutely safe for direct solar viewing of solar eclipses, sun spots and other solar phenomenon. All of our solar viewing materials are optical density 5 or greater and are CE certified which meets the transmission requirements of scale 12-16 of EN 169/1992. Lenses are made of our exclusive scratch resistant optical density 5, Black Polymer" material. Eclipse Shades filter out 100% of harmful ultra-violet, 100% of harmful infrared, and 99.999% of intense visible light. These premium filters create a sharper ORANGE colored image of the sun. The backside is printed with instructions and safety information. Frame is heavy card stock.