You might have gallons of brine in your face and 600 pounds on your hook, but these glasses still won’t slip. The Hydroliteco-injected lining takes care of that, and the flexible frame means serious comfort. Blackfin pushes the edge in sunglass performance–so you can push it everywhere else.
Every frame of the Expedition Collection features co-molded HydroliteTM materials for specialized temples. Here’s how it works: co-molded materials are injected together into a mold and fused into one material, creating a frame with specialized temples that perform in the harshest conditions on the planet. In other words, the more someone sweats, the better the sunglasses grip the skin.
These Costas, with their wrap around style, are designed to fit very close to your face. This can be important for those who wear contact lens and are outside in windy conditions.
Costa Del Mar Blackfin sunglasses get their name from the blackfin tuna. Blackfin have a football shaped body, black backs (including the fins) with only a light yellow on the finlets but with more yellow on the side. Blackfin are found only in the western Atlantic from Cape Cod to Brazil. Most blackfin reach a maximum size of around fifty pounds. They are an excellent sport fish on light tackle and are often hooked when fisherman are after larger game.