The bottom of the the lenses are razor sharp. I tend to rest glasses on top of my head. These would cut my scalp. I have had other pairs from the same manufacturer and they weren’t dangerous like these. My suggestion, don’t buy these sun glasses.
I was looking for a brown lens dark frame, instead of the brown lens with camouflage frame I already had.
This sunglass, is all black. But in the photograph it looks brown ☹️