Item No. AA 11 OBMGLP
Polarized Glass (580)


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  • Frame Color Shiny Black
  • Lens Material Polarized Glass (580)
    All Costa lenses have 100% UV blockage for maximum protection and 100% polarization to kill reflected glare. Our 580 technology goes beyond polarization to produce the clearest lenses on the planet. Choose Glass for superior clarity and scratch resistance. Choose Plastic for a lightweight durable option.
  • Lens Color Blue Mirror


Frame Color
Shiny Black
Lens Material
Polarized Glass (580)
Lens Color
Blue Mirror

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Costa Case

Cleaning Cloth

Free Shipping & Returns

Limited Lifetime Warranty

The MAG BAY Story

Named in homage to the mangrove-lined, estuary Magdalena Bay in Baja, California that has some of the best sport fishing anywhere, the Costa Mag Bay sunglasses are large-fit and ready for larger-than-life adventures, these Costa men’s sunglasses are 100% polarized and focused on performance. A trusted tool of any Angler looking for fishing Nirvana or a Voyager looking over the horizon.

Additional Information

MAG BAY is rated 4.4 out of 5 by 66.
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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Frame Specifications

  • Frame Fit: X-Large Fit
  • 1. Frame Width 132.6mm
  • 2. Bridge Width 14.4mm
  • 3. Lens Width 63.2mm
  • 4. Lens Height 42mm
  • 5. Temple Arm Length 132mm

Performance Technology

Light conditions are constantly changing. To get the most out of Costa lenses, it's important to choose the right color. We offer six lens colors that range from low-light like dawn to extremely bright light with blinding glare.

  • Blue Mirror

    Blue MirrorOpen reflective water

  • Green Mirror

    Green MirrorHigh Contrast

  • Silver Mirror

    Silver MirrorNatural Contrast

  • Gray

    GrayEveryday activities

  • Copper

    CopperVariable light, Driving

  • Sunrise

    SunriseActivities during low light

Costa 580G Lightwave Glass
  • C-Wall® Molecular Bond
  • Glass Layer
  • Encapuslated Mirror
  • Polarized Film
  • Glass Layer
  • C-Wall® Molecular Bond
Exploded view of 580G lens layers


Lightwave Glass

Superior clarity & scratch-resistant

  • Glass provides the best clarity in material
  • Encapsulated mirrors (between layers of glass) are scratch-proof
  • 20% thinner and 22% lighter than average polarized glass

U.S. PATENT NO. 6.334.680
U.S. PATENT NO. 6.604.824

Costa 580P Polycarbonate (+Trivex in RX)
  • C-WALL® Molecular Bond
  • Mirror (Optional)
  • Polycarbonate Lens
  • Polarized Film
  • Polycarbonate Lens
  • C-WALL® Molecular Bond
Exploded view of 580P lens layers


Polycarbonate (+Trivex in RX)

Lightweight, Impact-Resistant

  • Polycarbonate & Trivex are your lightest and most durable lens material options
  • C-WALL® is a molecular bond which is scratch-resistant

U.S. PATENT NO. 7.506.977

Costa 580P Polycarbonate (+Trivex in RX)
  • C-WALL® Molecular Bond
  • Mirror (Optional)
  • Polycarbonate Lens
  • Polarized Film
  • Polycarbonate Lens
  • C-WALL® Molecular Bond
Exploded view of 580P lens layers