Mainsail COsta Sunglasses-Born On the Water in the fishing capital of the world, Costa sunglasses are made for those who don't 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), it's like seeing in high-definition. Experience sunglasses for life's great adventures.