Bloc says -The Luca is a classic sunglass, a design that has stood the test of time. Kept up to date with the matt translucent frames, exposing the re-enforced temple structure. Subtle metal detail deco on the front of the frame finishes off this great looking sunglass. Distortion free, impact resistant XTR Karbon8 optical class one Polarised Grey category 3 lenses provide maximum protection against UVA, UVB and other harmful blue light up to 400nm