Costa Blackfin PRO An enhanced version of one of Costa s most trusted and well-loved frames, the Blackfin PRO builds off the original look and fit with six new angler-approved additions to keep you on the water longer. Along with a vented and fully-adjustable nose pad for a custom fit, sweat channels and eyewire drains will help keep your vision clear, while side shields, hooding, new stickier Hydrolite and metal keeper slots keep your frames and your focus locked in. Key Features: Available in polarized, color-enhancing 580G only for PRO-level clarity and scratch resistance. Sweat channels and eyewire drains are designed to help keep you cool and your vision clear so you can see things like fish. Or structure holding fish. Just go fish. Hydrolite temples get stickier the wetter they get. Our new formula is more durable and better than ever. Ventilated nose pads are fully adjustable for a customizable fit designed to help reduce fogging. Clip or tie in some keepers on and keep on keepin on fishing instead of trying to look overboard for your Costas, which are hard to see without your Costas. Side shields and hooding help keep light from leaking in so your focus stays fixed on finding fish.