Reinforcing the surfacing/sculpting on the temple. In connection with boat hull design. Injected ultra-thin, floating Hydrolite nose pads, Hydrolite temple tip. 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, it's like seeing in high-definition. Experience sunglasses for life's great adventures.