I started using the Tifosi Vogel Sunglasses about 2 months ago. 

They are a single lens sunglass and the version I chose was the Fototec version.  Meaning they transition with the change in light.

Likes - they are light as a feather and hug your face. They transition well when going from light to dark.

Dislikes - They fog up a bit on runs when the SD wind is going the wrong way.  On the one bike ride I have gotten in so far they performed great - no fogging.

Overall - great sunglass at a reasonable price - $59.95.
 
I am anxiously awaiting the early am rides when I can test the Fototec with a gradual increase in light as the day progresses.  I will keep you posted.

For more  - see us at TriNation

Compete with Confidence

Gabe