I got these for summer sports (soccer, frisbee, volleyball, and rafting).

The fotochromatic change was not dramatic, but was just enough for me.

It did a great job of dissipating moisture so the lenses did not fog up during heavy exertion.

They stayed on really well during active sports and even in whitewater. Unfortunately when I dove into the river in the middle of a water fight they did not stay, so I will need to replace them now.

I plan to buy the same set because I liked them so much. This time I will wear a croakie on the river, though.