These are fantastic

Like many swimming goggles, the left and right sides are identical and can be swapped. I got 2 pairs with different powers because my left eye is much weaker than my right. Anyway, I now have a backup pair. So far, they are working as expected. I initially thought the mirrored lens are not dark enough for the sunny days but they turn out to be adequate. The "anti-fog" coating usually does last very long but that is expected. I can't comment on their longevity...fingers crossed.

It so nice to be able to see while swimming laps, love them

All I did was rinse these goggles in the shower stream after swimming, never running the inside of the lenses. The right goggle now fogs on the inside, which is a real pain. Nothing lasts anymore.