Serengeti Nuvola Sunglasses， Metallic Black Frame， Polar PhD 555nm Blue Lens，<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Serengeti Polar phd 2.0 lens is built with NXT technology and made from trivex material， which is lighter than polycarbonate and offers a superior optical quality</li><li>Using only the highest-quality Injected nylon TR90 for superior durability， these frames are exceptionally light， extremely flexible and comfortable</li><li>With superior Serengeti Polarization， the fatigue， discomfort， squinting and impaired vision associated with all forms of glare simply go away. Polarization available in select models only.</li><li>Darkening in bright sunlight and lightening in overcast conditions. Serengeti photochromic technology allows your eyes to adapt to any light</li><li>Serengeti spectral control technology filters specific light wavelengths， sharpening the way you see color contract and improving visual definition</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31I2jMoGnsL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31mthY0VGGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31jPUJYyQoL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/413a4zOD0aL.jpg" noproxy>