Lenses are great. I bought my first pair from salt rock. The frame snapped but the lenses were so good I bought another 2 pairs on Amazon. I bought cases to protect them due to my first pair snapping. So far all 3 pairs suffer the same issue and the frames simply snap after a while. I emailed sinner asking them about the frames snapping but they didn't respond. That being said, they are good glasses with amazing lenses and offer value for money. Just not convinced about durability.