Serengeti Flex Polar PhD build upon the comfort of incredibly lightweight and comfortable frames with Serengeti Polar PhD lens technology. Polar PhD technology evolved from the proven NXT lens platform, combining the latest in polarization and photochromic lens technologies with Serengeti 's proprietary Spectral Control technology. Serengeti Flex Polar PhD features an all new polarization that avoids deterioration inherent with traditional film-based polarized lenses. Polar PhD Flex provides 98% polarization efficiency while automatically lightening and darkening to suit the conditions. Polar PhD Lens Technology is the newest evolution of polarized and photochromic lens technologies. The Advanced Polarized Surface Technology means the polarization is directly engineered on the back surface.
Serengeti Flex Polar PhD Sunglasses feature unparalleled contrast and superior color enhancement by filtering out specific colors within the visible light spectrum resulting in crisper color and clearer images. Polar PhD lenses also block distracting blue light. eliminating "blue blur" that leads to eye strain and fatigue.
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Serengeti Polar PhD Flex products are designed to withstand the harshest environmental conditions, provide protection from UV radiation and high velocity impact without compromising visual performance. Serengeti Sunglasses Flex Polar PhD lenses boast an anti-scratch hard coat, seven layer backside anti-reflective coating and oleo phobic coating technology for oil and water resistance.