The Solar Viewers by Baader Planetarium are a high-quality product which is extremely well suited for naked-eye solar observations. The most-common use-case for them are solar eclipses, both Total and Partial Eclipses.
BINTEL Team Member wearing Baader Eclipse Glasses
As the moon passes slowly in front of the sun, you can easily observe how the sun disappears behind it through the Solar Viewer. The spectacular event of a total solar eclipse itself, which usually lasts only for a few minutes, should then be enjoyed without the glasses and safely with the naked eye.
However, the SolarViewer can not only be used to monitor solar eclipses. You can also see larger sun spots through it, or simply discover the sun.