Item No. HFM 155 OBMGLP
Polarized Glass (580)


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  • 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
    • Blue Mirror
    • Green Mirror
    • Blue Mirror


Frame Color
Lens Color
Blue Mirror
Lens Material
Polarized Glass (580)
Prescription Ready

In Stock


OCEARCH Case and Cleaning Cloth


Free Shipping & Returns

Limited Lifetime Warranty


You'll look like a Maverick in Costa's Half Moon sunglasses, a West Coast inspired beach style that rides the mystique of epic ocean swells. Available in Shiny Black and Tiger Shark as tributes to the Icy water, huge swells and some of the largest sharks in the world that frequent Half Moon Bay. With straight temples, double-cut textures, and integrated Spring Hinges combine outstanding function and comfort with beautiful aesthetics. The sporty beach style of Half Moon embolden the thick, ominous waves of the legendary Mavericks surf break.

Sharks are in trouble, and without them the ocean ecosystem could collapse. Your purchase helps fund research expeditions aboard OCEARCH, a marine vessel and at-sea laboratory that generates critical data and puts science on the side of sharks. Explore the Case >

Additional Information

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

  • Gray Silver Mirror

    Silver Mirror
    Everyday activities

  • Silver Mirror

    Copper Silver MirrorNatural Contrast

  • Gray

    GrayEveryday activities

  • Copper

    CopperVariable light, Driving

  • Sunrise

    Sunrise Silver MirrorActivities 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

Frame Specifications

  • Frame Fit: Large Fit
  • 1. Frame Width 131mm
  • 2. Bridge Width 15.8mm
  • 3. Lens Width 59.6mm
  • 4. Lens Height 41.3mm
  • 5. Temple Arm Length 125mm
OCEARCH HALF MOON is rated 5.0 out of 5 by 6.
Rated 5 out of 5 by from Best Costas yet The frames are really lightweight and look awesome with the (stealthy) tiger shark pattern and the green mirror glass is high quality
Date published: 2017-06-17
Rated 5 out of 5 by from Great frame design for a medium to large fit The new Half Moon has a lot going for it. It has a versatile bridge shape and will fit most medium to large faces well. Some people will like the feel of the spring hinges, although that isn't as important to me. Both frame colors look super cool, and they have the stunning clarity of the 580G lenses. PLUS they benefit shark conservation! Highly recommended if you want a bit more of a retro look in your sport sunglasses.
Date published: 2017-06-19
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Are the OCEARCH HALF MOON in black available with the green lenses? 

Asked by: Watts21
Hi! The Ocearch Half Moon in black currently only comes with blue lenses.
Answered by: Costa
Date published: 2017-07-18

Will the Half Moon Tiger Shark with blue lenses ever be available? 

Asked by: Matt638
Hi! The Half Moon Tiger Shark frames currently only come with green lenses.
Answered by: Costa
Date published: 2017-07-14

Will they fit on an 13-14 years old boy?

Asked by: Graspable
Hi! Our frames are made in size levels S-XL. When shopping on the website, you can filter frames by their size options to see what frames are made for each size. Measurements are available under the description tab of each frame.
Answered by: Costa
Date published: 2017-07-16

Will the Ocearch half moon everhave 580G silver mirror lenses in the matte frame option?

Asked by: Sevo
Hi! The Ocearch Half Moon currently only comes with a green or blue lens.
Answered by: Costa
Date published: 2017-07-10

Do you have a cmates 0.25 on 580 g. And models.

Asked by: Nanoleo
Hi! The Ocearch Half Moon does not currently come as a reader. You can find all the reader options here:
Answered by: Costa
Date published: 2017-07-10

What wire retainer works best with this style?

Asked by: jared1202
Hi! The Neoprene keepers fit all frames but we suggest that larger arms be wet first. Keeper fits a small temple arm. Grippers hook through the arms but they must have holes for these. Costa Strap fits the skinniest temple arms.
Answered by: Costa
Date published: 2017-06-27

Will the Half Moons be made available with 580P lenses? 

Asked by: Cecil
Hi! The Half Moons are currently only made with 580G lenses.
Answered by: Costa
Date published: 2017-07-10

Can I get them with prescription lenses??

Asked by: Jimmy Neck
Hi there! Yes, these frames are available in Rx. Since our lenses are cut to meet your prescription, you will have to contact a Costa authorized Eye Care Provider concerning this. You can find more info about the Rx process at
Answered by: Costa
Date published: 2017-06-19
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