The Costa Del Mar Performance Tailfin Sunglasses deliver top-tier optical precision paired with a modernized, water-ready design engineered for serious outdoorsmen. This configuration pairs a vibrant Matte Chesapeake Blue frame with elite Blue Mirror 580G polarized glass lenses optimized specifically for open, deep-water environments. Costa's proprietary 580G Lightwave glass engineering drastically diminishes optical fatigue by filtering out harsh yellow light frequencies while maximizing contrast and true color definition. The full-rim bio-resin frame features specialized finlet-inspired side shields to block peripheral light leaks, integrated eyewire drains to clear splashes, and non-slip Hydrolite rubber contact points. Built to endure rigorous maritime environments and blinding direct sun, Costa stands behind these high-performance frames with their trusted limited lifetime manufacturer warranty. Costa Del Mar Performance Tailfin Men's Matte Chesapeake Blue Frame Blue Mirror 580G Polarized Lens Sunglasses 06S9113-91131760