Replace the old lens of your Flight Deck XM Goggles with the Oakley Flight Deck XM Replacement Lens. F3 anti-fog coating prevents fog and gives a clear visual clarity, while the IRIDIUM(R) coating offers precision tune, contrast, and light transmission for optimal visual clarity. Make your season stick out with proper protective eyewear. Oakley Fightdeck XM Replacement Lenses help you see your terrain and navigate the mountain all winter long, no matter the conditions. Don't be caught without them.