Tuna Alley Pro SunglassesAs recognizable as the sandy shelves between islands in the Bahamas that Giant Bluefin run through each spring, Costa's Tuna Alley frame now comes with an updated style and PRO Series upgrades. This legacy frames updated vent system is backed up by six fish spotting features to help you do it like the pros: Sweat management channels and eyewire drains, improved Hydrolite rubber, adjustable nose pads, top hooding and side shields, and metal keeper