I have been a Costa fan for many years and still love their product. Just as important to me was their dedication to customer service. Since being acquired, their level of customer service has declined. I will give them some time to return to the "Costa company culture" with respect to service. If this does not happen.............. I will consider switching to Maui JIm.

My eyes have become more sensitive to bright light as I get older. These glasses and lenses take glare and brightness out of the picture when driving but more importantly on the water where it's even brighter. I'll wear these glasses 10 to 12 hours a day and my eyes don't get fatigued nor do I have any problems with glare. Also I have a big head and these glasses fit too!

i have 3 pairs of the blackfins with different colored lenses. I absolutely love these shades for their comfortable fit and performance. I can wear these all day and not get a pain on the bridge of my nose and they cut glare and increase visibility through water better than any polarized glasses i've owned.

Great set of lenses. Very Clear..able to see deeper into water with no glare. Great for a long day on the water when its sunny.