The size and shape of the POC FOVEA MID CLARITY COMP helps peripheral vision which in turn improves safety. Double lens from a polycarbonate and cellulose propionate combination. POC brand has their lens manufactured by Zeiss company which guarantees perfect optical properties. Lenses features anti-fog and anti-scratch treatment, and air vents for fog reduction. Soft foam frame sits comfortably on the face and remains flexible even during extremely low temperatures.