Originally Posted by rosefarts

How are they with fog? Could you ride up a mountain pass as hard as you can on an 80 degree day? How about on a 50 degree day?

I find mountain passes to be the biggest challenge to eyewear, my heart rate will be 150+ up to 180 for the climb and I'm sometimes only going 4mph, probably never more than 10. It's not fast enough to dry the fog and it's a time when the most moisture is pouring from me.