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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.

Like its namesake, Mayfly is elegant, diverse and versatile. She exudes an oversized look and water-ready features for your complete enjoyment under the sun.The boldly femme, cat-eye design offers maximum light blockage and a wider field of view, and fully adjustable, textured and vented nose pads ensure a secure fit and helps keep lenses fog-free. With eyewire drains and channels, water and sweat will stay away from your eyes and keep you focused on the next adventure.Continuing our reputation for creating the best performance eyewear on the water, Mayfly is made to improve every experience.

Model name: Mayfly
Item no: 6S9110 911004 58-15
Frame color: Matte Black
Lens color: Blue Mirror
Lens material: Polarized Polycarbonate (580P)
Frame fit: Regular
Size: S
Lens curve: Base 8 Decentered
Size Fit Guide 1 Size Fit Guide 2
S
1. Frame Width: 128 mm
2. Bridge Width: 15 mm
3. Lens Width: 57.7 mm
4. Lens Height: 46.8 mm
5. Temple Arm Length: 123 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

Blue Mirror

Best for bright, full-sun situations on the open water and offshore.

  • Gray Base
  • 10% light transmission

Optimal usage

  • Boating and fishing in deep water
  • Open reflective water
  • Harsh sun

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


580® lightwave Polycarbonate

Costa 580G Lightwave Polycarbonate
  • C-Wall® Molecular Bond
  • Mirror (Optional)
  • Polycarbonate Lens
  • Polarized Film
  • Polycarbonate Lens
  • C-Wall® Molecular Bond
Exploded view of 580P lens layers

Lightweight, Impact-Resistant

  • Polycarbonate & 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

Mayfly

Mayfly

Costa Case

Cleaning Cloth