An interesting set of variable polarization glasses.Essentially, these are glasses with a 52mm rotating Neutral Density lens mounted on each eye which lets you dial in the polarization level that you want for each eye. It came with a little card that shows you how, with polarization, you can see colors through the lenses that are invisible to the naked eye. Probably pretty good at letting you see fish lurking beneath the surface of the water too ;)They're a little heavy, as those rotating lenses aren't thin, but that should help with their longevity. I can't speak for what might happen should you drop them, though, since they are on a rotating frame which could have issues with a strong impact....Just something to keep in mind.The frames supporting the lenses and rotating filters are strong, and I think the whole setup will survive regular but careful use.The very round shape is a bit different from your usual sunglasses, and the dialing in of polarization level is unique and kind of cool.If you need polarizing sunglasses, these are a great choice.

Kind of funky~! But they 100% do what is advertised~! You can adjust how bright or dim with just twist~! Wa~la~! Instant custom glasses~! I wish they werent so big around. It would be better for my small face if they were about half the size because they look crazy on me~! And if I wore them in the sun too long I would have ratcoon eye tan lines~! But Ive never seen any thing like them. No glare at all. Great polorization. They are a little heavy but not too bad. Pretty cool for something thats new.

These sunglasses are well-made... slightly front heavy than most but that's due to its design and changing darkness feature. The way it works it there are actually two lenses placed close together like a sandwich. And when you twist one a quarter of a turn, both the lenses get aligned such that their polarization lines form an exact 90 degree and it becomes its darkest. Twist them a quarter of a turn again and they align in a parallel form and the lenses become their brightest. It's gimmicky, it's fun and could be an ice breaker in backyard parties.