Hello, i want to know if all the models have the Fototec technology?, Red and smoke, Thanx
MICHAEL G Only if they specify "Fototec".
Fototec is available in either hi-speed red, or smoke, and never comes with multiple lens (for obvious reason)... enjoy!
ALLEN N Not all do. It has to specifically say photochromatic under the specs. I have 2 pairs of these so far, a clear pair and a smoke. Both have the ability to get lighter and darker. Interesting thing I have found, most windshields have a uv blocking coating so the sunglasses do not work as well as they do when you are truly outside. But they are great glasses and would buy them again.