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.