Introducing Tailfin - a modernized classic Costa design built for all waterman who require a clear view of their surroundings. Our Bio-Resin frame boasts refined and chiseled edges, complemented by features that help you stay comfortable and sweat-free, with your destination clearly in-sight. No matter where you're going, we built the Tailfin to help you get there - and maximize every moment spent on the water. Fit & Design: Regular fit sunglasses Polarized Blocks 100% of harmful UV rays 580G Lightwave glass lenses offer better clarity and scratch-resistance than polycarbonate lenses 20% thinner and 22% lighter than your average polarized glass, giving you a lightweight and comfortable wearing experience Technology: Costa 580(R) lenses were designed by in-house light spectrum experts to absorb harmful high-energy blue light (HEV), soften harsh yellows, and enhance reds, greens, and blues C-WALL(R) technology has a scratch-resistant molecular bond and repels water, oil, and sweat for easy cleaning Additional Details: Made from bio-based materials