The Hyper Optiks insert mates Fog City's legendary anti-misting technology with a new light-reactive, self-dimming effect. When exposed to bright light, the insert changes from pale mint green to cobalt blue in about 4 seconds. From inside the helmet the change seems minimal, but flipping up the visor reveals just how much of a difference it makes as your pupils shrink in horror. While not as effective as a set of Ray Ban's, the insert does reduce eyestrain and improve overall comfort, especially on overcast days. Plus it blocks UV radiation from scorching your face, which is great for those with an aversion to sunscreen.