Dirty Dog goggles are fitted with polycarbonate lenses that have been treated with a specially developed anti-fog coating for mazimum clarity in the harhest conditions. CVAFT (custom venting air flow technology) gives extra protection against lens fogging Super soft triple density face foam Materials tested to -20 degrees Polyester elastic strap with anti-slip silicone bead Anti-UV colours Large fit Dual spherical injection lenses Helmet compatible Grey/ Green fusion mirror lenses ideal for medium to bright light conditions Enhances contrast & reduces glare