Safety Labeling

Each style of the glasses had a completely different label on the back/inside, indicating they were likely not designed or manufactured in the same place. These are the inside of the US Flag striped version. The warning of only using it for three minutes in a row is my first clue that there might be a problem, although they are labeled as ISO 12312-2 compliant. Unfortunately, that's really no guarantee that they actually did the test.