the anon sync goggle features a unisex frame design with outstanding sonar lens technology by zeiss. the anon sync goggle features magnetic facemask integration (mfi®), which lets you connect your anon mfi face mask to the goggle with a simple click. it also comes with m-fusion magnetic lens change technology for a super-fast lens change, ensuring you're ready for all light conditions.over the glass compatible frame designed to accommodate prescription eyewear underneath the gogglesm-fusion combines the simplicity of fast lens alignment with a magnetic latch system that makes lens changes a snapperceive lens provides high-contrast vision and terrain defining clarity in just about any light conditioncylindrical injected lens designed reduces peripheral distortiona hydrophobic and oleophobic coating provides unmatched smudge, scratch, and moisture resistance on the outer lens surface for clear optics and easy cleaningintegral clarity technology anti-fog exceeds basic anti-fog treatment standards, delivering crystal clear vision that lasts for an extended period of time