Free Shipping
Price Match
Easy Returns
Licensed Opticians
The Costa Del Mar Fly Line 9129 sunglasses deliver serious fishing performance wrapped in a modern, versatile design. Built for anglers, boaters, and outdoor enthusiasts who spend long days on the water, these polarized sunglasses combine Costa's proven 580 lens technology with a wraparound frame inspired by the brand's best-selling Reefton model—at a price point that won't break the bank.
Costa 580 Lens Technology: See More, Fish Better
Every pair of Fly Line sunglasses features Costa's proprietary 580 lens technology, a multi-patented system designed by light spectrum experts to enhance color and contrast beyond standard polarization. The 580 lenses filter out harsh yellow light at 580 nanometers while blocking 100% of UV light and harmful high-energy visible (HEV) blue light. The result? Reds, greens, and blues pop naturally, giving you sharper contrast and higher definition—critical advantages when you're scanning flats for tailing redfish or tracking a bass in murky water.
The lenses are protected by Costa's C-Wall coating, a scratch-resistant barrier that repels water, oil, and sweat. Water beads and rolls off instead of clinging to the lens surface, so your view stays clear even in spray and humidity. Choose between 580G lightwave glass lenses for superior optical clarity and scratch resistance, or 580P bio-polycarbonate lenses for lighter weight and impact durability. Both deliver 99.9% polarization efficiency—among the best glare reduction available.
8-Base Wrap Frame & All-Day Comfort
The Fly Line features an 8-base curve wraparound frame that hugs your face and provides maximum coverage from sun, wind, and peripheral light. The rectangular shape (64mm lens width, 13mm bridge, 120mm temples) fits average to larger heads comfortably. Double-injected Hydrolite rubber grips the nose pads and temple tips, absorbing sweat and keeping the frames locked in place whether you're leaning over the gunwale to land a fish or navigating choppy water. Retainer-ready temple tips let you attach any lanyard or strap to keep your sunglasses secure during active use.
The frames are made from durable injected acetate with a matte finish available in multiple colors, including classic Matte Black and Matte Tortoise. At 136mm frame width, the Fly Line offers a large fit with a regular frame profile—substantial coverage without feeling bulky.
Prescription-Ready Performance
The Costa Fly Line 9129 is prescription-ready, so you can add single-vision or progressive lenses and enjoy the same color-enhancing, glare-cutting performance with your exact prescription. This frame accepts a wide range of prescriptions, making it a practical choice for anglers who need vision correction on the water.
Available in 15 lens and frame combinations—from neutral Gray and versatile Blue Mirror to the new Rose lens designed for variable light conditions—the Fly Line adapts to your fishing style and environment. Whether you're chasing stripers at dawn, sight-casting on bright flats, or exploring backcountry rivers, there's a lens color optimized for your conditions.
Product Details
Product DetailsModel
06S9129Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
TortoiseColor Code
912912Color Description
Matte TortoiseLens Color
Gold MirrorLens Features
polarized
Frame Color
TortoiseColor Code
912911Color Description
Matte TortoiseLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912906Color Description
Matte BlackLens Color
Sunrise Silver MirrorLens Features
polarized
Color Code
912913Color Description
SeagrassLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912909Color Description
Matte BlackLens Color
Blue MirrorLens Features
polarized
Frame Color
BlackColor Code
912904Color Description
Matte BlackLens Color
Copper Silver MirrorLens Features
polarized
Frame Color
BlackColor Code
912908Color Description
Matte BlackLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912901Color Description
Matte BlackLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912907Color Description
Matte BlackLens Color
RoseLens Features
polarized
Frame Color
BlackColor Code
912905Color Description
Matte BlackLens Color
Gold MirrorLens Features
polarized
Frame Color
BlackColor Code
912903Color Description
Matte BlackLens Color
Green MirrorLens Features
polarized
Frame Color
BlackColor Code
912910Color Description
Matte BlackLens Color
Green MirrorLens Features
polarized
Frame Color
BlackColor Code
912902Color Description
Matte BlackLens Color
Blue MirrorLens Features
polarized
Frame Color
BeigeColor Code
912914Color Description
Matte SandLens Color
Copper Silver MirrorLens Features
polarized
Color Code
912916Color Description
Olive ShaleLens Color
Green MirrorLens Features
polarized
Size Details
Size DetailsBridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
Bridge Width
13.00Temple Length
120.00Size
6413-120
California Proposition 65 Proposition 65 is a California regulation that requires special warnings to be presented to customers if a product contains certain quantities of chemicals or toxicants known to the State of California to cause cancer, birth defects, or other reproductive harm. The following warning applies to the products linking to this page:
WARNING: Reproductive Harm – https://www.p65warnings.ca.gov/Free Shipping within the contiguous US only (excluding Hawaii and Alaska) on all Orders over $100.
At DesignerOptics.com we are committed to the highest quality of service.
We ship products to all 50 US states as well as to many other countries around the world. We take all the measures to ship our items in a timely manner, directly to your door, almost anywhere in the world.
In stock products usually ship within two business days, but may take up to five business days*. When an order ships you will receive a confirmation email with the tracking information. You can also track your order by logging into your account.
We provide FREE SHIPPING on all orders over $100 We also offer overnight and second day delivery shipping options. Please note that when using next day or second day delivery it still takes 48 to 72 Business hours for the order to be processed.
The Designer Optics Low Price Guarantee is simple:
Designeroptics.com matches the price of all retail competitors and major online retailers.
How it works:
Place the frames in your cart
Before placing your order in add the following the comments box, Add the URL (web address) of the page where you found the lower-priced item,
Your credit card will not be charged until we have confirmed with you by phone or by email that your item qualifies for our Price-Match Guarantee.
Please Follow those easy steps for returns
1- Please fill out this form Return Authorization Form to get an RMA # you will receive a RMA # with instruction on how to return them within 48 to 72 Business hours from the time you submitted the form. Wait for our confirmation e-mail before shipping back the return
2- Send the product back to us following the instructions indicated in our e-mail and to the address we will provide you.
3- Make sure to confirm with us via e-mail the shipping date, the shipping service you used and the tracking number whenever you have
4- Include details of the return and how you would like for us to go about it (refund, store credit, exchange, etc). Designer Optics is not responsible for items damaged along the way.
Please allow us 3 to 5 business days from when items are received for us to process the refund. The amount to be refunded will not include shipping charges. if the order consists of 3 or more frames we will charge a 20% Restocking fee. otherwise only the shipping will be deducted.
Some exclusions may apply. Please note prescription lenses are final sale. We also do not accept returns on beauty products due to health and safety concerns. For more information please go to Returns
At Designer Optics, our skilled and experienced lab opticians play a crucial role in ensuring the quality and accuracy of your eyewear. With over 30 combined years of experience and full licensure, they review each prescription carefully and are equipped to answer any questions you may have.
Our state-of-the-art lab is equipped with the latest technology and equipment, including advanced edging and cutting technology, to produce lenses that are precise and accurate. Whether you need full frame or rimless lenses, our team is dedicated to providing the best possible results.
For personalized support, simply send an email to Support@designeroptics.com to request a call back from one of our friendly opticians.
Frequently Asked Questions
Are Costa Fly Line sunglasses prescription-ready?
Yes, the Costa Fly Line 9129 is fully prescription-ready and accepts single-vision and progressive lenses. You can add your prescription while maintaining the full benefits of Costa's 580 lens technology, including polarization, UV protection, and color enhancement. The frame accommodates a wide range of prescriptions.
What is Costa 580 lens technology and how does it work?
Costa 580 lenses filter out harsh yellow light at 580 nanometers on the visible light spectrum, which enhances reds, greens, and blues for sharper contrast and color. The technology also blocks 100% of UV light and filters harmful high-energy visible (HEV) blue light. With 99.9% polarization efficiency, 580 lenses provide exceptional glare reduction and clarity, making it easier to spot fish and see detail on the water.
What's the difference between 580G and 580P lenses?
580G lenses are made from lightwave glass and offer superior optical clarity and scratch resistance—they're 20% thinner and 22% lighter than average polarized glass. 580P lenses are made from bio-polycarbonate, making them lighter weight, more impact-resistant, and more affordable. Both lens types feature the same 580 color-enhancing technology, 100% UV protection, and C-Wall scratch-resistant coating.
How does the Fly Line compare to the Costa Reefton?
The Fly Line takes fit inspiration directly from Costa's best-selling Reefton frame, featuring the same 8-base wraparound design and coverage. The Fly Line is positioned as a more affordable option with modernized styling, offering Costa's core performance features—580 lenses, Hydrolite grips, and retainer-ready temples—at a lower price point. Both frames are built for serious anglers and water sports.
What size head does the Costa Fly Line fit?
The Costa Fly Line 9129 is a Large (L) size frame with a regular fit, designed for average to larger head sizes. Measurements are 64mm lens width, 13mm bridge, 120mm temple length, and 136mm total frame width. The 8-base wraparound design and adjustable Hydrolite nose pads help the frame conform comfortably to different face shapes.
Do Costa Fly Line sunglasses come with a case and warranty?
Yes, every pair of Costa Fly Line sunglasses includes a hard case and cleaning cloth. Costa offers a two-year limited warranty on non-prescription sunglasses purchased after November 2022, covering manufacturing defects in materials and workmanship. Proof of purchase is required for warranty claims.
Compare With Similar Frames
How the Costa Del Mar Fly Line 9129 Sunglasses stacks up against the closest alternatives we carry.
- More affordable entry point to Costa's 580 lens technology and performance features
- Modernized aesthetic with cleaner lines and updated styling
- Same 8-base wraparound coverage and Hydrolite grip technology as the Reefton
- Significantly lower price point while maintaining core 580 lens technology
- Same wraparound 8-base coverage and field of view
- Lighter weight feel, especially with 580P polycarbonate lenses
Read the full comparison
Costa Fly Line vs. Reefton: Which Frame Is Right for You?
If you're deciding between the Costa Fly Line 9129 and the Costa Reefton 9007, you're comparing two frames from the same performance DNA. Costa designed the Fly Line by taking the fit and wraparound coverage of their best-selling Reefton and modernizing it with updated styling and a more accessible price point.
Both frames feature the same 8-base wraparound design that blocks peripheral light and provides maximum sun protection. Both use double-injected Hydrolite rubber on the nose and temples for a secure, sweat-resistant grip. And both are built for serious time on the water, with retainer-ready temple tips and Costa's legendary 580 lens technology.
The key difference? The Fly Line delivers these core performance features at a lower cost, making it an excellent entry point if you're new to Costa or want a second pair for different conditions. The Reefton, as Costa's established flagship performance frame, offers a wider range of frame colors and finishes, plus the refinement that comes from years of angler feedback and iteration.
For budget-conscious anglers who want proven Costa performance, the Fly Line is hard to beat. You get the same lens technology, the same wraparound coverage, and the same all-day comfort—just in a more streamlined package. If you prefer the classic Reefton aesthetic or want access to the full range of frame options, the Reefton 9007 remains an excellent choice.
Fly Line vs. Reefton Pro: Performance on a Budget
The Costa Reefton Pro 9080 represents the top tier of Costa's performance lineup, with premium materials, advanced construction, and refined details. The Fly Line, by contrast, focuses on delivering the essentials—580 lenses, wraparound coverage, Hydrolite grips—without the premium price tag.
If you're a weekend angler or someone who wants Costa quality without stretching your budget, the Fly Line offers exceptional value. You're getting the same color-enhancing, glare-cutting 580 lenses and the same secure fit that keeps your sunglasses planted during active use. The Reefton Pro adds premium frame materials, additional color options, and construction details that serious anglers and guides appreciate after thousands of hours on the water.
Both frames are prescription-ready, so you can add your exact vision correction. The Fly Line's lower price makes it easier to justify adding prescription lenses or purchasing multiple pairs for different light conditions. For anglers who fish occasionally or want a high-performing backup pair, the Fly Line is a smart choice. For professionals and dedicated enthusiasts who demand the absolute best, the Reefton Pro justifies its higher cost.
At a Glance
Costa Del Mar Reefton 9007 Sunglasses
Pros:
- More affordable entry point to Costa's 580 lens technology and performance features
- Modernized aesthetic with cleaner lines and updated styling
- Same 8-base wraparound coverage and Hydrolite grip technology as the Reefton
- Retainer-ready temple tips for securing with lanyards
- Available in new lens colors including Rose for variable light conditions
Cons:
- Newer model with less long-term durability feedback from users
- Fewer frame color options compared to the extensive Reefton lineup
- May lack some of the premium finishing details of the higher-priced Reefton
Costa Del Mar Reefton Pro 9080 Sunglasses
Pros:
- Significantly lower price point while maintaining core 580 lens technology
- Same wraparound 8-base coverage and field of view
- Lighter weight feel, especially with 580P polycarbonate lenses
- Excellent value for anglers who want Costa performance without premium pricing
- Full prescription compatibility at a more accessible price
Cons:
- Lacks the advanced materials and construction of the Pro model
- Fewer premium frame finish options
- May not have the same long-term durability as the higher-end Reefton Pro