Costa Blackfin Pro Sunglasses - Fly Fishing 

An enhanced version of one of Costa’s most trusted and well-loved frames, the Blackfin PRO builds off the original look, polarized lens 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.