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 Austin is a Rimless frame for Men and Women, which is made of Nylon.Nylon is a thermoplastic material that is blended in order to counteract its initial brittleness. Nylon blends are lightweight, stable, and resistant to breakage. Nylon has less of a tendency to "bleed" it's plasticizers resulting in great hypoallergenic properties. It can be blended with polyamides,grilamid, or trogamid. This model features a Rounded Edges shape, with a Single Bridge.The Costa Austin Sunglasses feature the following logo: Costa logo on templeThese Sunglasses work well for people whose style is: Sporty, Cool/Trendy.Ideal for usage with: Fashion, Sports, Water Sports, Beach Volleyball, Water Skiing, Swimming, Fishing, Salt Water, Fresh Water.Costa Austin Sunglasses come with a cleaning cloth and protective carrying case.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.