I needed to use the darker lens on a really bright day and the lack of polarization matters. These are cheap and dark.

What they are good for is if you need the clear lens for cycling at night. They are very cost-friendly for that usage. But one star because they are useless to me in bright conditions.

There are glasses about $5 to $10 more dollars with polarized lenses and more care given to the eye protection. I take that back. I just paid about the same price for a pair of polarized sport sunglasses, albeit not with interchangeable lenses, just with the dark one.