Shamir Headquarters 
This often occurs during strenuous activity, typically due to the body giving off increased heat, and humidity getting trapped behind their glass lenses. The solution to this challenge is Shamir’s Glacier Anti-fog technology. With an ultra-thin layer that prevents the water droplets produced by trapped humidity from forming fog on rear lens surfaces, this coating helps eyeglass wearers maintain performance-critical clear vision.
Important: Do not ink-mark the back surface of lens, as ink-marks cannot be removed!
