KEY FEATURES SONAR Technology by ZEISS Optics provides enhance contrast allowing you to see more information about snow conditions Magna Tech? Quick Lens Change System uses magnets to hold lens in place making swaps a breeze Compatible with all Anon M2 Mens Snow Goggles Extend the usability of your Anon M2 Snow Goggles with these Anon M2 SONAR Replacement Lenses Designed by ZEISS Optics for exceptional clarity theyve been treated with Anons ICT treatment to keep things clear and fog free On top of that the SONAR Technology is designed to enhance contrast in all light conditions This makes it easier to read the texture of the snow and shape of the terrain as you ride making it easier to plan your path down every trail SPECSMain Lens Light Conditions AnyLens Type Spherical