I have taken this glasses to several extensive trail in South Sierra.
It definitely help me see clearly under blazing sunlight and snow. The lenses is very robust. Without all the dust and rocks, it never scratch.
The frame is slightly heavier when sitting on your nose. But other features are easily overcome this shortcoming.
Pros: Comfortable, Photochromic
Cons: Slightly heavy frame, no polarized
This review was written in the old system and had content requirements that are different than reviews written today.