FWIW, in 2008 I was issued both Gentex glasses and about mid tour, Revision Sawflys.
Funny sunglasses story. I kept my "good" eye pro on my IBA for missions outside the base. For general walking around, my Battle Buddy picked up a few pairs of cheap sunglasses from Dillon for about 6 bucks a pair. They looked decent and worked well. They finally broke a couple of months back.
The Fobbits who were hot for cool guy gear used to ask us about our sunglasses - on the assumption that since ours were different, they were somehow "cooler", LOL. We pretty much screwed up our opportunity to sell the Fobbits 6 dollar sunglasses for 60 bucks a set when we revealed how inexpensive those glasses actually were.