We at Eclipse Gear consider the safety of our product our number one concern. For that reason the film we use is tested, and ISO certified to be safe for viewing the Sun. Don’t buy any solar viewing glasses that do not have the ISO certification.
Each eclipse brings out the people that are just trying to make a fast buck at your expense. No price is worth the loss of your eyesight. Solar eclipse glasses are basically one-time use glasses that are relatively inexpensive.
Anyone that plans to look at the Sun should do a little research to prevent catastrophic damage to there eyes. If you have children that will be observing this spectacular event, be sure that they are protected.
Finally, the ISO certification on this page is what you should be looking for in any solar glasses. Therefore, if you can’t find the certification, look elsewhere. It just isn’t worth taking the chance.