I think I already know the answer to this, but if you had 2 of the same pair of glasses (flak jackets for example), if one were women's and one were men's, would they fit any differently? My girlfriend and I are getting ready to buy a jeep wrangler, and she is worried about her glasses flying off her face when the top and doors are off. She currently has the necessity frame. They look fine on her, but if she so much as bends over or turns suddenly, they will fall off her face. I told her to try on my flak jackets and see if they fit tight enough, and my flak jackets were still a little loose. She is small and has a hard time finding glasses that fit snug. She asked if a women's pair of flak jackets would be tighter. I told her that I didn't think so, but I would double check. So here I am.