The all new 509® anti-fog fan, stops fog dead in its tracks. If you sweat a lot or just want an extra level of fog stopping protection, the 509® anti-fog fan is for you.

• This is a removable fan module that installs directly into your existing pair of 509® goggles
• Specifically engineered to work with both 509® Sinister & Aviator goggles
• In addition, it’s compatible with virtually every other goggle brand on the market
• The fan module has 3 settings: Off, On, and Auto
• Auto setting automatically detects fog and turns on the fan only when needed
• Powered by one AAA battery (included)