I just started using Rudy Project glasses, and they work great. Interchangable lenses, and certain models allow for a prescription insert. Fantastic if you are not a fan of contacts when flying. And since it is used in sports, the design prevents fogging of the lenses. Also, I think Rudy Project USA allows a trade-in for used or damaged lenses.

I obtain a pair from someone of ebay, and the prices were very good. Email me if info is needed. BTW, I am not sponsored! Just a happy user.

Derek