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Product Information


If you have the cojones, you can swim with them. (The sharks, that is.) If you just want kick-ass style and max coverage, wear these. Built around optical spring hinges, these full-wrap sunglasses come in any number of toothy colors. Go ahead, jump in.


  • Comfortable extra-large fit.
  • Optical spring hinge.
  • Durable co-injected nylon frame.
  • Includes hard case.
  • 100% UV light blockage for max protection.
  • 100% polarization kills reflected glare and reduces eye strain.
  • Built by hand and backed for life. Every pair of Costa Sunglasses includes a limited lifetime warranty.
  • Plastic lenses are lightweight, impact- and scratch-resistant.
  • Glass lenses have the greatest clarity and are scratch resistant.
  • This style is prescription ready, click here to learn more about Costa prescriptions.


  • Base curve of 8.
  • DBL: 19.9mm
  • Temple Length: 133mm
  • Lens size A/B: 63.8mm/38.4mm



HAMMERHEAD is rated 4.5 out of 5 by 29.
Rated 4 out of 5 by from Great glasses Love the glasses, I got a pair of prescription glasses for fly fishing, they block out the sun giving you a great, clear look at fish in streams, but the one draw back, during hot humid days, since the frames have no ventilation, the lenses tend to fog over requiring attention ever half hour or so.
Date published: 2015-12-01
Rated 5 out of 5 by from Awesome Glasses I bought my Hammerheads in 2010. Used them extensively on salt water while I was boating. The glasses are very sturdy. Last year (2015) the frames discolored a little bit plus the logo fell off one of the legs. I sent them to Costa repair and they fixed them under the warranty for a minimum (11.95) fee. They no longer carried the white frame I had so they asked me to select a new frame. I would recommend this glasses or ANY Cost glasses for that matter. Their service has been awesome.
Date published: 2016-02-18
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