Pros: Comfortable, Durable, Optimal clarity, No glare, light weight
Cons: Fogs up, nosepiece could be more sturdy

I've been wearing Oakley M Frames since the late 80's. They are extreemly durable & I wouldn't trust any other brand of shades. I would rather wear my Oakleys than safety glasses.
In fact I'm only on my 3rd pair of M Frames in the last 20 + years. I lost my first pair on the job back in 1996. & 2 years ago I gave my best friend my old back up pair when I bought the pair I currently own back in 2003.
I swear by these shade.