Lens help with Smith Phenom goggles?

I wanna get a new lens on my smith phenoms but im having a hard time figuring out which lens i want, i wanna silver mirror so you cant see my eyes at all, which one of these would be the best for what i want? a href="http://www.smithoptics.com/products/#/Replacement+lenses/Snow+Goggle+Lenses/Phenom+Replacement+Lenses/view/" rel="nofollow"http://www.smithoptics.com/products/#/Re…/a and also, what does vst mean? thanks for the help!