KEY FEATURES Magna Tech Quick Lens Change Technology makes it easy to swap between lenses holding them in place with magnets Choice of lenses allows you to tune your vision to suit the conditions SONAR Lenses by ZEISS are designed for exceptional clarity Goggles are all about protecting and enhancing your vision so the Anon M2 Goggles are designed to do both of those tasks better and easier than anyone else The key technology of these frames the Magna Tech quick change system holds lenses in place with the power of magnets making it quick and simple to swap between tints So its easy to wear the SONAR Green when its bright and sunny or enhance contrast on overcast days with the SONAR Infrared Blue lens Either way the optics are by ZEISS so you can count on exceptional clarity SPECSFit MediumMain Lens Light Conditions Partly SunnySpare Lens Light Conditions Low LightLens Type SphericalMain Lens VLT pct 23Spare Lens VLT pct 46FEATURESSpare lens includedEyeglasses CompatibleQuick Change LensesHypoallergenic Face FoamRimlessUV ProtectionMoisture Wicking Face FoamAnti Fog CoatingNo Slip Strap