I think marketing is a little deceptive, products lack compete description, the nano coating should be fully explain as you never get clear view with a film of fluid on inner surface and as told in instructions, without through wetting, fog protection won't work.
Anyway, kept one, oh the other one on female face keep leaking as nose pad has no adjustment, so stop labeling universal fit as we are at 50% for a fit.
Need to work on honest marketing and product features and limitations.