For many years I have used glasses with yellow and red tints. O.K but not quite what I wanted. These glasses have made me rethink the tints to use. The club I spend most of time time at has a strong evergreen background. The purple tint makes birds pop out against this background. I love it. If you are a dinosaur and used a camera with black and white film with filers to enhance contrast, its the same thing violet worked great on many occasions.
They are standard inexpensive plastic lens with O.K construction. You get what you pay for. If they cost a lot more my ratings might be lower. Try them.

These safety glasses have flat ear pieces, allowing ear muffs to fit snug to the face. The lens are clear and they look stylish on the face.

I opted for these because I have to regularly wear safety glasses at work as well very clearly see what I am doing. (Aircraft maintenance) the company provides glasses but I can notice a loss in clarity. When these glasses are nice and clean I don't feel the need to pull them off to closely examine a part. They stay put and are fairly comfortable.

I love everything about these, except for one thing.

The Pros...
These are lightweight, very attractive, and I really love the FDE color that I received.
(They are actually in-between FDE and "green" as stated by them, but it's close enough for either one, just not a perfect match)
There appears to be enough room on the bottom so that it will help alleviate fogging. The price is also a good thing.
Also, the cloth bag that comes with it is not bad, but for the best protection I will be getting a hard case to ensure their protection, because they will 'live' in my range bag most of the time.

The Cons...
The pros outweigh the cons, but, the one con that I have is not a good one.
That would be, I saw a very noticeable decline in my vision when I put them on. Just to make sure, I put them on for about 10 minutes and nothing changed, so it's definitely the glasses.
When I look at things close up and at a distance with these on there is a discernible degradation to my vision right where it counts, but probably all over the lenses.
It's not my imagination, it's definitely there, it's very slight, but when wearing glasses to aim at things at a distance, we need all of the help that we can get.
I will say that when shooting at a distance of around 30 yards and closer there probably won't be a big difference, but that is just a guess, really meaning, closer targets, etc.

This is not bad enough that I would return them, I mean it is, but I'm just not going to go through the trouble of that, so I'll keep them, I'll give them a try at the range and see how it turns out.
At the very least I will use them when I am on my riding mower, the (cheap $2.00) ones that I use now are even worse. :)

Since I have not read where anyone else has said this I would 'might' buy again, it might be the luck of the draw, you never know.

I cannot really rate durability without having used the product for a few months but, the frame appears to be robust slip under my headset easily. The lens wraps around the eye sockets and protect the eye well. I have the dark lens on my pair. Outdoors they work really well in bright sunlight. Would have been nice to have clear lens for indoor use though. They are comfortable to wear over extended periods. The case provided is adequate to protect the frame in my helmet bag. Happy with the purchase.

Note to manufacturer: Designing the frames to be able to swap lenses and also providing a clear lens would be a big plus.