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Mag Bay

Product Information


Off the coast of Baja California, Magdalena Bay has mangrove-lined swamps, fertile estuaries, and some of the best sportfishing in the world. These extra-large fit sunglasses were made for big adventures in a fisherman's paradise- wherever you find one.


  • Comfortable Extra Large fit.
  • Optical Spring Hinge.
  • Heavy-duty TR 90 nylon frame.
  • Includes hard case.
  • 100% UV light blockage for max protection.
  • 100% polarization kills reflected glare and reduces eye strain.
  • Built by hand and backed for life. Every pair of Costa Sunglasses includes a limited lifetime warranty.
  • Plastic lenses are lightweight, impact- and scratch-resistant. 
  • This style is prescription ready, click here to learn more about Costa prescriptions. 


  • Base curve of 8.
  • DBL: 14.4mm
  • Temple Length: 132mm
  • Lens size A/B: 63.2mm/42mm



MAG BAY is rated 4.4 out of 5 by 62.
Rated 2 out of 5 by from Temple Issues Continue I bought these in June when I sent my Conch in to have the temples replaced because the tips had pealed of of them. Well now 4 months later the temple inserts on these have also pealed from the frame. Have owned over 10 pairs of Costa's over the past 15 years and love the lens and clarity but the last few frames I have had all of the temples grips have either crumbled and or pealed from the frame. These were Fathoms, Permits, Conch, Tuna Alleys, and now Mag Bay. Not happy that I have to spend $30+ to get temples repaired every time and I take care of my glasses always in a case when not used.
Date published: 2016-09-15
Rated 3 out of 5 by from Great glasses, BUT.... Bought these in March 2016. Within one month the plastic wrap on the arm that touches your ear came unglued from the plastic arm. Not wanting to be without my shades during spring and summer, I superglued it back. Within another month the other arm wrap began to come loose. Needless to say, I sent them back to Costa. While I am happy they are fixing them, I am a little miffed that it will take them over a month to just replace two faulty arms and that it is costing me $$. I think this is clearly a failure and I shouldn't have to pay ANYTHING, including shipping. These are $250 glasses and they failed within a month and it's taking over a month for the repairs to be done. I'm not happy. That being said, they ARE great glasses.
Date published: 2016-07-21
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