Costa Tailfin 580G Sunglasses - Matte Black Green

Great eyewear shouldn't require a great fit compromise. The Costa Tailfin 580G in Matte Black with Green Mirror glass lenses is the same performance-driven waterman frame — now sized for those who've always had to make do with frames that were just a little too wide, a little too heavy, a little too much.

The small sizing on the Tailfin isn't a scaled-down afterthought. It's a purpose-built fit for a face that deserves the same full Costa experience as everyone else on the water.

Bio-Resin Frame: Lighter Than It Looks

The Tailfin's Bio-Resin construction sets it apart from standard nylon frames. It's chiseled, refined, and engineered to be lightweight without feeling fragile. The Matte Black finish keeps glare off the frame itself — no reflections bouncing back into your field of vision when the sun is high and the water is flat. Adjustable nose pads let you dial in the fit precisely, and sweat channels keep things comfortable through long days in the heat.

Green Mirror 580G Lens

The Green Mirror on a copper base is the inshore angler's weapon of choice. Built for sight fishing in full sun, it cuts surface glare while amplifying contrast — so you can read the water, track movement below the surface, and spot fish before they know you're there. At 10% light transmission and a Base 8 Decentered curve, it wraps aggressively for maximum peripheral coverage while keeping your forward vision sharp and color-true. Costa's 580G polarized glass handles the rest: filtering the wavelengths that cause eye fatigue and holding up to the abuse of life on the flats.

Frame Features

• Bio-Resin construction — lightweight, chiseled, built for all-day wear
• Small fit — purpose-built sizing for a precise, comfortable fit
• Matte Black finish — no-glare frame that won't distract your vision
• Adjustable nose pads — fully customizable, nonslip fit
• C-Wall® coating — repels water, oil, and sweat; scratch-resistant
• 100% UV protection — full UVA and UVB blocking
• Base 8 Decentered lens curve — aggressive wrap for maximum coverage

Specs

• Frame Fit: Regular | Size S
• Lens: Green Mirror 580G Polarized Glass
• Lens Curve: Base 8 Decentered
• Item No: 6S9113 911307 57-17
• SKU: 097963967259

Same water. Same sun. Same Costa performance — finally in a frame that actually fits.

We Ship every business day Monday-Friday. Products purchased before 2pm est, will ship same day. Most shipments arrive with in 2-3 days. We ship USPS and UPS.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.  If Item is returned after the 30 days of getting approval for return, you will only receive store credit. 

Unfortunately, we cannot accept returns on sale/discount items or gift cards.  Returns will not be accepted if tags are no longer attached to item as this will be considered used.  

To be eligible for a return, the item must be in the same condition that you received it, unworn or unused, with tags on, and in its original packaging. You’ll also need the receipt or proof of purchase.

Incorrect Shipping Address Policy

We kindly ask customers to carefully review their shipping information before completing their purchase.

• Customer Responsibility: We are not responsible for orders shipped to an incorrect address provided during checkout. If you realize there was an error, please contact us immediately.
• Reshipping Fees: If your order is returned to us due to an incorrect address, we can reship it, but additional shipping charges will apply.
• Lost Packages: If the package is lost due to an incorrect address entered by the customer, we are unable to issue a refund.
• Changes After Shipping: Once the order has shipped, we cannot update the address or reroute the package.

We appreciate your understanding and encourage you to double-check your shipping information before placing an order.

To start a return go to start a return at the bottom of the homepage, and enter your order number.  For mailing address after a return is excepted please mail to:  SoHa Surf Shop, 518 Phoenix Street, South Haven, MI 49090

If your return is accepted and was over the mark of $79 for free shipping, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.  Please note: Our Original Shipping cost paid to ship it to you will be deducted from your refund.  If you are returning an item that you purchased two different sizes of the same item.  Original shipping cost and cost of return will be deducted from refund.

If your return was under the $79 mark and did not qualify for free shipping, you are responsible for the cost of shipping the item back to us at 518 Phoenix St, South Haven, MI 49090.  Once received, we will inspect the item and issue the refund.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item.  We can then evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Exchanges

Exchanges can only happen if you purchase the item your looking for as another order.  We can then ship this to you right away as we wait for your item to come in so we can return it.

European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved.  If approved, you’ll be automatically refunded to your original payment method within 10 business days.  Please remember it can take multiple business days for your bank or credit card company to process and post the refund.
If more than 15 business days have passed since we’ve approved your return, please contact us at Support@sohasurfshop.com.