$179.00 - $259.00


Slide of


  • 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 Gray Silver Mirror
    • Blue Mirror
    • Gray Silver Mirror
    This frame was not available with the previously chosen lens. Available lenses are shown above. Out of stock


Frame Fit
Prescription Ready
Item No
Select Styles for Availability


Costa Case

Cleaning Cloth

Free Shipping & Returns


Additional Information


You’ll look like a Maverick in Costa’s Half Moon sunglasses, a West Coast inspired style that rides the mystique of epic ocean swells. With straight temples and double-cut textures, the sporty large fit Half Moon’s Integrated Spring Hinges and polarized lenses provide outstanding function and comfort with beautiful aesthetics; While inset Hydrolite® nose and temple pads prevent slippage for all-day hard core use.

Recommended Retainer: C-Line Adjustable Retainer


See what adventures others are taking their Costa sunglasses on.
Share your own with #SeeWhatsOutThere.


HALF MOON is rated 4.7 out of 5 by 49.
Rated 1 out of 5 by from Do not buy online I ordered a pair July 2nd and I just got my fourth pair August 8th and they still had a flaw in the lens. For $200 they should be flawless. When I called about the second pair having a scratch in the lens upon delivery the super nice lady I talked to offered me some free stuff. The shirt that I received had a hole in it.
Date published: 2019-08-08
Rated 4 out of 5 by from Solid Great lenses, one of the arms is a little loose and wobbly, but overall very happy.
Date published: 2019-08-04
Rated 5 out of 5 by from Love them !! I just bought a pair of the half moon, and I love them !! I also have a pair of tuna ally and the cabalitto and the half moon are my fav! They fit amazing and the clarity are amazing would def recommend , would love put a diff color logo on the side but I still love them !!
Date published: 2019-07-06
Rated 5 out of 5 by from Great lens! Great fit! Great color, exactly what I ordered!
Date published: 2019-06-23
Rated 3 out of 5 by from Good clear lens...... Just had cataracts removed, bought the Half Moon blue. Great clarity in the lens for my vision but, cheap frames that have to have made in china, loose and creeky. Guess we will play the warrany game if they fall apart.
Date published: 2019-05-22
Rated 5 out of 5 by from PURE CLARITY!! I was a little skeptical spending that amount of money on sunglasses. But after my friend was treated with the highest customer service available I pulled the trigger. I was impressed immediately after putting them on. Comfortable Even hours after wearing them. So clear it’s hard to tell there are lenses in them.
Date published: 2019-04-28
Rated 3 out of 5 by from Not what I expected I bought a month ago and I’m unhappy. Never again will I buy Costa’s without trying them on first.
Date published: 2019-01-14
Rated 5 out of 5 by from Perfect for life in FL! These are quite simply the most fantastic sunglasses I have ever owned. Great look, fit, build quality, and the lenses are a step above the rest. I specifically went with the silver mirror lenses for the the bright light conditions I encounter while driving or working outside in Florida
Date published: 2018-09-27
  • y_2019, m_9, d_16, h_4
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.13
  • cp_1, bvpage1
  • co_hasreviews, tv_7, tr_42
  • loc_en_US, sid_halfmoon, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_costadelmar

Questions & Answers

Best sunglasses for bass fishing

Asked by: JJmahoney70
Hi! All of our performance sunglasses are great. We recommend our green mirror lens or copper lens for higher contrast.
Answered by: Costa
Date published: 2019-07-22

I bought the half moon with blue lenses and failed to notice your lens specific chart, are they going to be good for everyday activity not on the water going to the ball game, driving etc.? 

Asked by: Cp124
Yes! Our blue mirror lenses are a great every day choice.
Answered by: Costa
Date published: 2019-06-12

Hola half moon sirve también para mujer????

Asked by: Marianela
¡Hola! Sí, este estilo es para hombres y mujeres.
Answered by: Costa
Date published: 2019-02-12

Can I not choose what lense and frame combo I want can't seem to find a option for that 

Asked by: Hank 29
Hi! All the options shown are what we currently have available. There is not an option to select a custom lens and frame color combination with this frame style.
Answered by: Costa
Date published: 2019-01-13

Do both arms have integrated springs or just one?

Asked by: Infocala63
Answered by: Costa
Date published: 2019-01-13

Which retainer would you recommend for the half moon. 

Asked by: Donks
Hi! We recommend the adjustable retainer for the Half Moon.
Answered by: Costa
Date published: 2019-01-05

Can I use blue mirror lenses for every day activities such as driving or are they specifically for on the water?

Asked by: ibedatbul
Hi! Our blue mirror lenses are great for every day activities and life on the water.
Answered by: Costa
Date published: 2019-01-11


Hi! Yes, there are several 580P lens options available for Half Moon.
Answered by: Costa
Date published: 2019-01-05
  • y_2019, m_9, d_16, h_4CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.13
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_34
  • loc_en_US, sid_halfmoon, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_costadelmar

Sunglass Specs

  • Frame Specifications:
  • 1. Frame Width 131.0mm
  • 2. Bridge Width 15.8mm
  • 3. Lens Width 59.6mm
  • 4. Lens Height 41.3mm
  • 5. Temple Arm Length 125.0mm

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 seven 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