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Premium Polarized 580 Lenses*

Filtering reflective glare is essential for anyone on the water or outdoors. We sell only polarized sunglasses.

100% UV Protection

Your Costas absorb 100% of UV light, providing you the best in light management and protection.


Scratch Resistant and Durable

The C-Wall coating provides extra scratch-resistance and a barrier that repels water, oil and sweat for easy cleaning.

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 polarized and focused on performance. A trusted tool of any Angler looking for fishing Nirvana or a Voyager looking over the horizon.

Model name: Mag Bay
Item no: AA 10 OGMGLP
Frame color: Tortoise
Lens color: Green Mirror
Lens material: Polarized Glass (580G)
Frame fit: Regular
Size: XL
Nosepad adjustable: No
Lens curve: Base 8 Decentered
Size Fit Guide 1 Size Fit Guide 2
XL
1. Frame Width: 137 mm
2. Bridge Width: 13 mm
3. Lens Width: 63.1 mm
4. Lens Height: 42.8 mm
5. Temple Arm Length: 130 mm

Regular Fitting

A large lens front designed to fit those with an average-sized head.

6 Base Curve Decentered

8 Base Curve Decentered - Max Coverage

Frames with maximum-coverage and wrap that help reduce light leak.

Regular Fit
Regular

Forgot Your Ruler?

Use this handy guide to gauge the fit you're looking for.

S
M

All the Way?

You might be looking for a small or medium frame.

M
L

Middle Pegs?

You might be looking for a medium or large frame.

XL

Last Two Pegs?

You might be looking for an x-large frame.

Blue lens

Green Mirror

Enhanced vision and contrast for fishing inshore and on flats.

  • Copper Base
  • 10% light transmission

Optimal usage

  • Sight fishing in full sun
  • High contrast

Costa 580® lenses

Costa 580® lenses were designed by in-house light spectrum experts to enhance colors because standard sunglass lenses fell short.

The lens' multipatented technology
manages light by:

  • Absorbing Harmful High-Energy Blue Light (HEV)
  • Enhancing Reds, Greens, and Blues
  • Filtering Out Harsh Yellow
Without lenses With lenses
580® Polarized Lenses

580® lightwave glass

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

Superior clarity & Scratch-resistance

  • 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

Mag Bay

Mag Bay

Costa Case

Cleaning Cloth