As requested: http://img145.imageshack.us/i/sam0006.jpg/
These haven't even seen a game. I opened them just to put them on the goggles. Like I said I haven't used them a great deal so! And I haven't had any fogging up at all when using them.
I think it's just an anti fog solution, I haven't needed to use it though.
well summed up, they are hard coated with an anti-fog treatment, the sprays are just designed to refresh this if needed.The Grillz lenses are odd, as noted they aren't thermal lenses, but don't fog up. I've scrubbed the inside of one of my lenses (Got mud on it somehow) and they still don't fog, and I breathe really heavily and sweat a lot.
Just thought I'd throw that in so you know