Photochromic Smart Lens protective eyewear features transitional, abrasion-resistant polycarbonate lenses, a soft adjustable nose bridge, nylon brow and magnesium alloy spring-hinged temple for a flexible fit.
Transition from light to dark takes less than 20 seconds (allowing just 22% light transmission), and dark to light takes less than 3 minutes (allowing 77.5% light transmission).
