Serengeti Trento Sunglasses (Green Fade, 555nm Polarized) polarized Sport Classics Lightweight and sleek for more active lifestyles, our Sport Classics are designed with the same premium technology you've come to expect from Serengeti Eyewear. 555NM Polarized This lens maximizes greens and yellows for high contrast and clarity, and combats glare with premium polarizing technology ideal for all bright light conditions. 15% Transmittance lightened lens/8% transmittance darkened lens