Make sure your solar eclipse glasses meet these criteria.
Look for the ISO # 12312-2 - Also look for the reputable manufacturers listed below because some companies are printing the ISO # on their glasses just to appear compliant.
Reputable Manufacturers
*American Paper Optics [Eclipser] / Eclipse Glasses.com
3dglassesonline.com
*APM Telescopes (Sunfilter Glasses)
*Baader Planetarium (AstroSolar Silver/Gold Film)
*Celestron (EclipSmart Glasses & Viewers)
*DayStar (Solar Glasses)
*Explore Scientific (Solar Eclipse Sun Catcher Glasses)
* Halo Solar Eclipse Spectacles
*Lunt Solar Systems (SUNsafe SUNglasses)
*Meade Instruments (Eclipse Shades)
*Rainbow Symphony (Eclipse Shades)
*Seymour Solar (Helios Glasses)
*Thousand Oaks Optical (Silver-Black Polymer & SolarLite)
*TSE 17/110th.de (Solar Filter Foil)