Extra large full-wrap frames and polarized glass lenses give you the wide, clear view prized by sport fishermen.Hammerhead sharks with their distinctive heads and wide-spaced eyes have an almost 360-degree view of their surroundings. Their vision makes them excellent hunters. With full-wrap coverage and mirrored, 100% polarized lenses, these Costa Hammerhead Sunglasses will bring improved visual performance to your sport fishing in open waters. Are they durable You bet. You'll find their heavy-duty TR-90 nylon frames made with resin from the castor plant almost indestructible. This bio-based resin offers a 70% reduction in emissions over petroleum-based resin, helping to reduce the overall carbon footprint. 100% polarized, scratch-resistant 580G Lightwave glass lenses ensure you'll see more of your surroundings. Whether you're after mahi-mahi in the open ocean or on a plate drizzled with basil, butter and a little lemon juice, the Hydrolite nose and temple pads will keep your shades securely on your face. Blue mirrored lenses are the way to go for offshore use with bright, full sun on open reflective water.580G Lightwave Glass LensesPolarized to eliminate reflective glare and reduce eye strainSuperior clarityScratch-resistant20% thinner and 22% lighter than average polarized glassEncapsulated mirrors between the layers of glass are scratch-proofMirrored lenses deliver superior contrast and color while enhancing visual acuity100% protection from UV lightAbsorbs harmful high-energy blue light (HEV)Cuts haze and blur for greater clarityFilters out harsh yellow lightEnhances reds, greens and bluesSharp contrast with high definitionTR-90 Nylon FramesCastor oil is used to make the bio-based plastic resinBio-based resin offers a 70% reduction in emissions over petroleum-based resinReduced overall carbon footprintFlexible, yet tough and durableLightweight, full-wrap styleHold their shape under harsh conditionsResistant to heat and coldHydrolite hypoallergenic rubber nose and temple pads prevent slippingCorrosion-resistant, stainless steel optical spring hinges keep their shapeKey FeaturesExtra large fit580G Lightwave glass polarized