Very pleased with my Duco glasses; I love them best of any sun glasses I ever owned. I have been using them for several weeks now.
1.  These glasses are feather-light-weight.
2.  They darken my view sufficiently even when my eyes are extremely light-sensitive.
3.  The lens color seems to improve the look of all things. The sky, the grass, everything else now looks more pleasant - as if looking at a pretty color photograph that is sharp and clear. My more expensive, also polarizing, blue tint wear-overs, can't compare to these Duco glasses.
4.  I was actually able to bend the material myself to make the glasses fit. And, they stay put.
Now, I am finally comfortable under the bright TX sun.