I know this is an old post but I use Oakley goggles when conducting MFF. I've modified them by sewing velcro on the straps and then use velcro with adhesive (Home Depot).
With the military ACH helmet a little lip helps keep the goggles locked in. I haven't lost a pair yet. I recommend a goggle with a spongy or foam seal around the face as opposed to rubber, it helps keep the moisture out. Freeing the oppressed of my own accord...and other stuff.