Whether you're a celebrated explorer or just in search of the best spot on the beach to view the sunset, these sunglasses will change your view of the world.Discoverer. Navigator. Cartographer. Captain James Cook took exploration in the late 1700s to a whole new level. Having twice circumnavigated the globe and barely missed sighting Antarctica, we're willing to bet he could have used a pair of Costa's Cook Sunglasses to make his observations that much clearer. In fact, their durable, 100% polarized, scratch-resistant 580G Lightwave glass lenses might have saved him that costly repair job he incurred sailing directly into the Great Barrier Reef by eliminating the reflective glare from the open ocean. Their lightweight, corrosion-resistant, large-sized titanium frames and flexible beta titanium temples make them so comfortable the years at sea might have felt, dare we say, a bit less arduous. Plus, you can't count out the dignified effect the Hydrolite nose pads would have made in dealing with restless natives in subtropical locales since they would have stayed securely in place rather than sliding down unceremoniously. As legend has it, adding a neoprene retainer or leash (sold separately) is inexpensive insurance against your Cook Sunglasses ending their journey prematurely. Blue mirrored lenses are the way to go for offshore use with bright, full sun on open reflective water (uncharted or not).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 definitionTitanium FramesCorrosion-resistant, hypoallergenic titaniumStrong as steel, but lighter weight and flexibleReverts back to its original shape after pressureHydrolite hypoallergenic rubber nose pads prevent slippingDurable beta titanium temples bend to reduce damage and broken