Moderate quality, cheap plastic, you expect that from their price, of course.
As glasses, they do what they should, you can see satisfactorily.
One of the two pairs I had broke with minimal use, without me putting any strain on it.
For occasional use, they are OK, but only up to that point.

just fine, for reading something quickly it's just what you need
note: they have "foldable" arms, which are very convenient
for putting on and taking off