The filters in use with the glasses are quality optical with density 5 or greater. You can safely assured that they are "CE" certified which meets the transmission requirements of scale 12-16 of EN 169/1992. (Australian standard AS 1338.2 and 1338.3).
Lenses are made of exclusive scratch resistant optical density 5, "Black Polymer" material. Besides that, Eclipse shades filter out 100% of harmful ultra-violet, 100% of harmful infrared, and 99.999% of intense visible light.
The backside is printed with information for safe use and warnings about correct usage.