Costa specializes in sunglasses for the fishing enthusiast. Custom-made lens treatments and state-of-the-art lens manufacturing processes mean Costas can stand up equally well to salt water and fresh water. Costa sunglasses offer 100% UV protection in a wide variety of high glare or low light lens colors. Not only for fishing, the various specialized lenses can be used for golf, driving, and water skiing (just a few of the possibilities!) These anti-corrosive frames are perfect for any fisherman, or just someone looking for one of the best pairs of sunglasses out there.Free gift with purchase: Get a Costa C-Line™ Ultra-thin sunglass retainer!Costa Blackfin - USA Limited Edition is a Full Rim frame for Men, which is made of TR90 Nylon.TR-90 is a durable, flexible material that is both light weight and comfortable. TR-90 retains its shape by memory, so it will not need adjustments; it is also temperature resistant. This model features a Rectangular shape, with a Single Bridge.The Costa Blackfin - USA Limited Edition Sunglasses feature the following logo: Costa C logo on the templeThese Sunglasses work well for people whose style is: Sporty.Ideal for usage with: Sports, Driving, Everyday Driving, Fishing, Salt Water, Fresh Water.Costa Blackfin - USA Limited Edition Sunglasses come with a cleaning cloth and protective carrying case.These sunglasses are available with a mirror coating option on certain colors. Mirror coatings are suitable for protection from intense light. A mirror coating reflects back light and reduces the amount of light passing through the lens. This makes it more comfortable for eyes in very sunny conditions.These sunglasses are available with polarized lenses on certain colors. Polarized lenses have a filter within the lens that blocks the wavelengths of light that cause glare. They can greatly enhance contrast and allow for greater depth of vision, especially in water. They are ideal for any situation where glare reduction is necessary, like driving or playing sports.