Electric Nashville XL Respecting the original Nashville, we've scaled up the sizing to create a frame that offers more coverage and a larger look while maintaining a modernized and minimal styling. Frame: - Lightweight and flexible, our featherweight Grilamid® injected frames are impact resistant and maintain high flexibility. Grey Polarized lens: - Optimal lens for daily use in bright conditions. Provides increased clarity and depth perception while providing visual comfort. Featured in all of our sunglasses, melanin (which gives the lens a slight green tint) blocks 98% HEV blue light, provides crisp vision and a heightened level of defense, all while delivering 100% UVA/UVB protection. The Grey Polarized lens block 99.9% of debilitating glare from the water's surface. Cutting through the glare of the water’s surface while providing superior color contrast, you'll see your best with polarized. Polarized lenses provide crisp vision, reduced eye fatigue and all-around healthier eyes. - Lens material: All of our Grilamid frames use Bayer Makrolon® raw Polycarbonate material for our lenses. These lenses are lightweight and impact resistant. - Hard coating: A double-sided coating that reduces minor scratching. Offered as a standard treatment on all lenses. - VLT: 10%