With a name like Fish Hook, these sunglasses aren't accustomed to being landlocked for long.You'll want to take them out fishing as soon as possible.Fish hooks have been used by fishermen to catch both freshwater and saltwater fish for centuries. In fact, archaeologists have discovered some made from shells dating back 23,000 years. Polarized sunglasses didn't make their appearance until 1936. So protecting your eyes from the sun and eliminating the reflected glare from water is a fairly recent development from a historical perspective. And we haven't even touched on the need for durable frames yet. Costa's Fish Hook Sunglasses are going to be part of your essential go-to gear for years to come.Pelagic PMG (Polarized Mineral Glass) Lens Technology is the difference. Marine grade polarized optics, produced in state-of-the-art European optical laboratories, utilizing a proprietary blend of naturally occurring minerals and rare earth elements that are specifically developed for life on the water.” Harsh, salty and ever-changing conditions that often persist for days on end are no match for their unique combination of features (described in greater detail below). Their Carbonite-16 frames are engineered to survive everything from the extreme conditions you'll find offshore to the simply sunny surroundings you'll have to endure while sipping cocktails by the pool. Tough, yet flexible. Lightweight and comfortable. Perfectly balanced for performance. Their nonslip Grip-Tex nose and temple pads SHOULD keep them securely on your face. However, a neoprene retainer or leash (sold separately) is inexpensive insurance against losing them overboard. There's even a laser engraved marlin in the top corner of one lens so there's no mistaking your passion.Precise Optical AccuracyPelagics PMG Lens Technology provides the highest level of distortion-free optical clarity and visual accuracy.Zero-Glare (ZG3X) PolarizationThe ZG3X polarization process dramatically eliminates haze, glare and unwanted light reflections commonly encountered both on and off the water.Tuff-Lens Scratch ProtectionIndustry-leading durability, greater surface hardness and the highest degree of scratch resistance.The PMG AdvantageEach PMG lens provides multi-finish hydrophobic and oleophobic coatings