Fog City Hyper Optiks Visor Inserts HPAX Light reactive, anti-fog, UV blocking vision A unique light reactive anti-fog visor insert, Hyper Optiks combines the advantage of the world renown FogCity anti-fog inserts with the newest photochromatic technology Built with a 20 mil, optical grade polycarbonate lens Changes color from a light mint green to a cobalt blue in less than 4 seconds under bright light Incorporating molecular-based antifog technology, the anti-misting properties of the Hyper Optiks insert will never wear out or saturate like chemical coatings, sprays and lesser quality anti-fog inserts based on acetate and butyrate substrates