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Product Information


Hard-core sunglasses for hard-core saltwater junkies. These co-injected co-molded frames combine perfect fit with the best polarized lenses on the planet to give you maximum comfort and vision on the water. A true sportsman is always prepared, so keep an extra pair in your tackle box.


  • Comfortable medium fit.
  • Integral hinge.
  • Heavy-duty TR 90 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: 17.5mm
  • Temple Length: 117.6m
  • Lens size A/B: 60.5mm/34.8mm



FATHOM is rated 4.9 out of 5 by 57.
Rated 5 out of 5 by from Full time live aboard boater I live on my boat full time, 10 years so far. I expose them to constant salt air as we cruise in all types of weather. These glasses (Fathom, blue mirror glass lens) are on my head from sun up until after sun down, every single day. I do not squint with these and it makes seeing into the water much easier. No discomfort whatsoever. I would highly recommend these for anyone, especially anyone serious about boating, fishing or any outdoor activity. Never lost shape and never fallen off, no matter what I am doing. Buying another pair, just to have a backup. Thank you Costa, for saving my eyesight in extreme conditions. M/V Leap of Faith, Punta Gorda, FL
Date published: 2016-06-30
Rated 5 out of 5 by from Great Sunglasses exceptional quality I bought my first pair about 15 years ago and they are my daily eyewear(prescription lenses from Clearsight Opticians). I purchased a backup pair in Tortoise shell with green mirror that I use while on vacation, or special occasions since they are in like new condition. Go ahead and do your eyes a favor and buy Costa's you cannot go wrong. Don't settle for any substitutions or cheap ones, you only have one set of eyes. You will not be disappointed with the purchase, they are well worth the price.
Date published: 2016-12-02
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