Costas with 580G lenses (glass): own a pair and you will never even consider another brand.

I am a fly fisherman, sight fishing for fish. Costas let me see details that no other glasses can. Almost every other real fly fisherman that I know also wears Costas.

Things that you might see through other glasses are much more visible with 580Gs. I had numerous other high-end glass before I bought my first pair of Costas. There is an very noticeable increase in color contrast.

Because of the superior color contrast that they have, they are also great for navigating through the reef.

I use the green mirror 580G lenses.