The 509 Aviator 2.0 Lens is available in a full spectrum of weather-specific tints so you can adapt your 509 Aviator 2.0 Goggles to any condition. Swapping lenses couldn't be easier thanks to the magnetic powers of the 5MAG lens retention system. The Aviator 2.0's unique toric lens shape maximizes field of vision and enhances optical clarity. And like all 509 lenses, these spare tints are protected with the industry's best anti-scratch and anti-fog coatings