Its been a while since I last graced a cockpit but I always used Randolph Aviators.
I'm amazed that so few have mentioned them?? The Randolph Aviator standard issue sunglasses for U.S. armed forces pilots, Top Gun Flying School and NASA.
Things mush of change since I've retired
Info
http://www.avidaviator.com/randolph_sunglasses.html
www.randolphusa.com