The trusted tool of the true angler, Costa&';s Blackfin sunglasses bring serious clarity and comfort to a day fishing, whether it&';s wrestling marlin in the deep sea, spinning up salmon in the river&';s current or fly casting for bonefish along the coast. Polarized, flexible and boasting a Hydrolite co-injected lining, these Costa men&';s Angler fishing sunglasses are made for performance and are a necessary addition to any tackle box. Product Features: a 20% THINNER AND 22% LIGHTER THAN AVERAGE POLARIZED GLASS a 580G LIGHTWAVE GLASS SUPERIOR CLARITY & SCRATCH-RESISTANT a 580P POLYCARBONATE (+TRIVEX IN RX) LIGHTWEIGHT, IMPACT-RESISTANT a C-WALL IS A MOLECULAR BOND WHICH IS SCRATCH-RESISTANT a ENCAPSULATED MIRRORS (BETWEEN LAYERS OF GLASS) ARE SCRATCH-PROOF a GLASS PROVIDES THE BEST CLARITY IN MATERIAL a POLYCARBONATE & TRIVEX ARE YOUR LIGHTEST AND MOST DURABLE LENS MATERIAL OPTIONS