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Product Information


You might have gallons of brine in your face and 600 pounds on your hook, but these sunglasses still won't slip. The Hydrolite™ co-injected lining takes care of that, and the flexible frame means serious comfort. Blackfin pushes the edge in sunglass performance--so you can push it everywhere else.


  • Comfortable large 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 Costas include a 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: 16.9mm
  • Temple Length: 118.1mm
  • Lens size A/B: 61.4mm/ 39.7mm
BLACKFIN is rated 4.5357 out of 5 by 28.
Rated 5 out of 5 by from Best Frames I have five different pairs of blackfins. With the new injection molding these are by far my favorite glasses. I also have a pair of cuts, wingmans, corbinas, tuna alleys, double haul, isabellas, south point, cudjoes and a few others. Just wish costa would bring back the gunmetal frame for the blackfins. I'm a walking promotion and will never purchase another brand of sunglasses. Thanks Costa Crew!
Date published: 2015-11-24
Rated 4 out of 5 by from Stupid rubber. Bought these Blackfins, they're great sunglasses. Sent them in for a lense repair, Costa was very timely about this. Got them back and wore them for a few months, rubber started coming off. What the heck is the point of putting rubber around the inside of sunglasses when it doesn't really hold them to your head? Not very happy with these because of the rubber mess on them.
Date published: 2016-03-24
Rated 5 out of 5 by from Great Glasses I have 2 pairs of this same model. I have had other models but these fit me perfectly. I will only buy the blackfin for now on. Costa is also very good at repairing the glasses. I have had them fix the lenses once already.
Date published: 2016-01-22
Rated 2 out of 5 by from Rubber came off My husband has had these for less than a year and the rubber came off. I wish there was a way to purchase these exact sunglasses in black that doesn't have the rubber piece. Hoping to send them in to be repaired.
Date published: 2016-01-07
Rated 5 out of 5 by from Great fit great glass This is my 6th pair of Costas. I'm happy with them. Try look very well and fit very well also. I always recommend any Costa 580G. They are good.
Date published: 2016-02-09
Rated 3 out of 5 by from Rubber Delaminated Great optics but the rubber delaminated and the nose piece did as well. Overall I've had good success with Costa.
Date published: 2015-12-10
Rated 2 out of 5 by from Fix the rubber issues I've sent back theses glasses twice now, rubber just falls off. Also they fog pretty bad in humid conditions
Date published: 2016-03-31
Rated 5 out of 5 by from Great quality glasses. Excellent lens clarity. Amazing glasses, comfortable, durable, amazing clarity. Highly recommend the BlackFins.
Date published: 2015-12-24
  • 2016-04-29T07:56CST
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