Time passes, but classic equipment remains! The Costa Brine and Costa Fathom's retro design feature the clearest lenses produced today with Costa's patented 580® technology. With the Costa Brine’s slight square frame, you will definitely be looking cool on the water. The Costa Fathom adds slightly round edges, which will bring classic style into modern style. Check out our review comparing Costa Brine vs Costa Fathom!


Costa Brine

Costa Brine

Costa Brine in Matte Black and Green Mirror lens

The Costa Brine reflects a unique kind of old-school truism from the Costa core collection. A full eight-base wrap provides the perfect fit for your head and absolute coverage. The smaller retro looking sunglasses allow you to create your own angler style. The Costa Brine has the modern tech that merges with the retro trends.


  • Medium to large fit
  • Full eight-base wrap
  • Anti-slip Hydrolite rubber
  • 580® lens for superior clarity
  • Venting system

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Costa Fathom

Costa Del Mar Fathom, Costa Sunglasses, Costa Del Mar, Fishing Sunglasses

Costa Fathom in Tortoise and Green Mirror lens

Looking at the Costa Fathom? You have a keen eye for details. Shrewd fishermen never want to miss any movement under the water, and the Costa Fathom comes with the color and contrast enhancing 580 technology for seeing every detail. The Fathom also has extra coverage on the edge, which results in optimal eye protection. The frame itself helps to cut peripheral glare, providing the patient angler extra comfort all day to catch the biggest fish.


  • Medium Fit
  • Vents to help airflow
  • Anti-slip Hydrolite rubber
  • Patented 580® lens
  • Scratch resistance

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So Costa Brine or Costa Fathom?

Vintage design is for life and Costa’s BioResin frames design is also for life. By utilizing castor seed oil, Costa is able to create an ecologically-conscious yet durable frame material for all their nylon frames. Costa sunglasses made from TR-90 nylon are strong yet lightweight. Also, Costa’s high-performance technology with 100% polarization and UV blockage, and glare and reflection protection makes any Costa lens/frame combo perfect for performing on the water. Ultimately, choosing between the Costa Brine or Fathom comes down to fit. For a medium to large fit, grab the Brine. For a true medium, pick up the Fathom

Get Costa Prescription Sunglasses at SportRx

Still can’t decide which one suits you best? We have over two decades of experience in custom prescriptions and have certified opticians who will help you make the right choice. All our certified opticians are available over the phone and email, so Contact Us. Check out our customer reviews to see what our customers have to say about our service and prescription lenses! Get the frames you want in the fit you need at SportRx.

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