high-performance goggles from anon with perceive lenses . the anon m4 toric goggle offers a precise fit with a wide field of vision of a toric lens. innovative magna-tech® technology allows for quick and easy lens changes through powerful magnets and offers unprecedented versatility.this version of the m4 comes with two toric lenses with perceive optics, for high-contrast clear vision in any terrain. high-quality anti-fog treatment ensures crystal-clear vision in all weather conditions. magnetic face mask integration (mfi®) offers seamless face mask attachment, while full-length vents provide consistent air circulation for clear, fog-free vision. perceive sun red lensthe perceive sun red lenses are suitable for sunny days and slightly cloudy days. perceive lenses give you high contrast to better see the terrain. transmittance of visible light: 14 %perceive cloudy burst lensthe perceive cloudy burst lenses are suitable for very cloudy days. perceive lenses give you high contrast to better see the terrain. transmittance of visible light: 59 %