Most of them aren't actually 'fake', they are just not rated high enough to look directly at the sun. I bought a ten pack on ebay on Friday, and only 2 pairs we

Most of them aren't actually 'fake', they are just not rated high enough to look directly at the sun. I bought a ten pack on ebay on Friday, and only 2 pairs were ISO 13 or higher, the other 8 pairs were ISO 5 grade. They are still ISO rated, just not for eclipses. So to check, look and see what rating you have on your glasses and look for >13.