Costa - Introducing Tailfin - a modernized classic Costa design built for all waterman who require a clear view of their surroundings. Our Bio-Resin frame boasts refined and chiseled edges, complemented by features that help you stay comfortable and sweat-free, with your destination clearly in-sight. Offering two size options, both those with bigger and smaller heads can embark on their watery adventures fully equipped. Category 3. General purpose sunglasses. High protection against sunglare, good UV protection, not suitable for driving at twilight, at night or under dull light. Born On the Water in the fishing capital of the world, Costa sunglasses are made for those who dont just spend their lives on the water, they come to life on the water. Each pair is packed with polarized, color-enhancing 580 lens technology. The result? Less haze and enhanced contrast and clarity. Available in glass (580G) for superior clarity and scratch resistance or a lightweight, impact-resistant polycarbonate (580P), its like seeing in high-definition. Experience sunglasses for lifes great adventures.