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The Costa Del Mar Broadbill II 9120 sunglasses deliver serious performance for anglers and water sports enthusiasts who demand superior optics and all-day comfort. Named after one of the ocean's most formidable gamefish—the broadbill swordfish—these rectangular wrap sunglasses combine Costa's decades of fishing heritage with cutting-edge lens technology and thoughtful design details that make a real difference on the water.
Costa 580 Lens Technology: See More, Fish Better
At the heart of the Broadbill II is Costa's patented 580 lens technology, a multi-layered optical system designed by in-house light spectrum experts specifically for water environments. The 580 designation refers to the wavelength (580 nanometers) where the lens filters out harsh yellow light and harmful high-energy blue light. This selective filtration enhances reds, greens, and blues while cutting haze and boosting contrast—making it dramatically easier to spot fish beneath the surface or read the water for structure.
The Broadbill II is available with your choice of 580G glass lenses or 580P polycarbonate lenses. The 580G glass option delivers the absolute best optical clarity available, with mirrors encapsulated between layers of glass for a crystal-clear, scratch-resistant surface that's 20% thinner and 22% lighter than typical polarized glass. The 580P polycarbonate lenses offer maximum impact resistance and lighter weight, making them ideal for active use. Both lens materials feature 99.9% polarization efficiency—the highest level available—and Costa's proprietary C-Wall coating, which provides exceptional scratch resistance and repels water, oil, sweat, and dust for easy cleaning.
Built for the Water: Design That Performs
The Broadbill II takes inspiration from the original Broadbill frame but elevates functionality with a hybrid design built for versatile watermen. The 8-base wrap frame curves around your face to provide maximum coverage and minimize light leak from the sides. Micro side shields and integrated hooding further block stray light and protect your eyes from wind and spray—critical features when you're spending long hours in bright, reflective conditions.
Vented Hydrolite rubber nose pads are a standout feature. The ventilation channels increase airflow across the frame, significantly reducing fogging even when you're moving between air-conditioned boat cabins and humid deck conditions. The Hydrolite material itself absorbs sweat and becomes grippier as you perspire, keeping the sunglasses securely in place without slipping. Hydrolite rubber temple tips provide the same secure, comfortable grip.
The frame is constructed from eco-friendly bio-resin, a sustainable material partially derived from castor oil plants. This bio-based nylon delivers the same durability and performance as petroleum-based materials but with a smaller carbon footprint. The matte finish on both the tortoise and black frame options resists glare and looks sharp whether you're on the boat or off the water.
Prescription-Ready Performance
The Costa Broadbill II 9120 is prescription-ready, allowing you to enjoy the full benefits of Costa's 580 lens technology with your exact vision correction. The large rectangular lens front (58mm width, 15mm bridge) is designed to fit average-sized heads and provides ample room for prescription lens fabrication without compromising optical quality or field of view.
Who It's For
The Broadbill II excels in fishing applications—from sight-fishing shallow flats to offshore trolling—but its versatile design transitions easily to everyday wear. The rectangular shape and matte finishes work equally well at a wedding, behind the wheel, or on a hiking trail. If you spend serious time around water and need sunglasses that won't quit when conditions get tough, the Broadbill II delivers the capability and broad protection you require.
Product Details
Product DetailsModel
06S9120Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
TortoiseColor Code
912010Color Description
Matte TortoiseLens Color
Gold MirrorLens Features
polarized
Frame Color
TortoiseColor Code
912008Color Description
Matte TortoiseLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912002Color Description
Matte BlackLens Color
Green MirrorLens Features
polarized
Frame Color
BlackColor Code
912004Color Description
Matte BlackLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912006Color Description
Matte BlackLens Color
Blue MirrorLens Features
polarized
Frame Color
BlackColor Code
912007Color Description
Matte BlackLens Color
Green MirrorLens Features
polarized
Frame Color
BlackColor Code
912005Color Description
Matte BlackLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912003Color Description
Matte BlackLens Color
Gold MirrorLens Features
polarized
Frame Color
TortoiseColor Code
912009Color Description
Matte TortoiseLens Color
Green MirrorLens Features
polarized
Frame Color
BlackColor Code
912001Color Description
Matte BlackLens Color
Blue MirrorLens Features
polarized
Frame Color
BrownColor Code
912013Color Description
Matte Brown SmokeLens Color
GrayLens Features
polarized
Color Code
912011Color Description
Deep Blue FadeLens Color
Blue MirrorLens Features
polarized
Frame Color
BlackColor Code
912012Color Description
Matte BlackLens Color
RoseLens Features
polarized
Color Code
912015Color Description
Matte ClearLens Color
Blue MirrorLens Features
polarized
Frame Color
CopperColor Code
912016Color Description
Matte Terra CottaLens Color
Gold MirrorLens Features
polarized
Color Code
912017Color Description
Matte SitkaLens Color
Gold MirrorLens Features
polarized
Size Details
Size DetailsBridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
Bridge Width
15.00Temple Length
134.00Size
5815-134
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Frequently Asked Questions
Are the Costa Broadbill II sunglasses prescription-ready?
Yes, the Costa Broadbill II 9120 is fully prescription-ready. The frame is designed to accommodate prescription lenses while maintaining the full benefits of Costa's 580 lens technology, including polarization, UV protection, and color enhancement. The large rectangular lens front provides ample room for prescription fabrication.
What is the difference between 580G and 580P lenses?
580G lenses are made from glass and provide superior optical clarity with scratch-resistant mirrors encapsulated between glass layers. They're 20% thinner and 22% lighter than typical polarized glass. 580P lenses are made from polycarbonate, offering maximum impact resistance and lighter weight at a lower price point. Both deliver 99.9% polarization efficiency and the same color-enhancing technology.
What makes the Broadbill II different from the original Broadbill?
The Broadbill II takes inspiration from the original Broadbill but adds enhanced functionality with a hybrid design. Key improvements include micro side shields and hooding for better coverage and minimal light leak, vented nose pads to reduce fogging, and an 8-base wrap for elevated protection from the elements. The Broadbill II is designed for more versatile use both on and off the water.
Do the Broadbill II sunglasses have 100% UV protection?
Yes, all Costa Broadbill II sunglasses absorb 100% of UV light (UVA, UVB, and UVC), providing comprehensive protection for your eyes. The polarized 580 lenses also filter out harmful high-energy blue light and harsh yellow light for superior light management and reduced eye strain during long days outdoors.
Will the Broadbill II stay secure during active use?
Yes, the Broadbill II features Hydrolite rubber nose pads and temple tips that become grippier as you sweat, keeping the sunglasses securely in place. The vented nose pads also increase ventilation to reduce fogging. The 8-base wrap design hugs your face for a secure fit, and reviewers consistently note that the rubberized components keep the frames from slipping even during intense activity.
What size head does the Broadbill II fit?
The Costa Broadbill II features a large lens front (58mm lens width, 15mm bridge, 134mm temple length) designed to fit those with an average-sized head. The frame provides full-wrap coverage with maximum protection. The flexible bio-resin material and Hydrolite rubber components help the frame conform comfortably to different face shapes.
Compare With Similar Frames
How the Costa Del Mar Broadbill Ii 9120 Sunglasses stacks up against the closest alternatives we carry.
- Similar price range ($201-$285)
- Same 580 lens technology and polarization
- Rectangular wrap design for fishing
- Lower starting price ($163.54 vs $201)
- Wider face fit
- Same 580 lens technology
- Similar price range ($193-$296)
- Same 580 lens technology
- Designed for fishing and water sports
Read the full comparison
Costa Broadbill II vs. Other Costa Fishing Sunglasses
Choosing the right Costa sunglasses for fishing comes down to fit, features, and budget. Here's how the Broadbill II 9120 compares to other popular Costa models in our collection.
Broadbill II vs. Costa Blackfin 9014
The Costa Blackfin is one of the brand's most popular fishing frames and offers similar performance at a lower starting price ($163.54 vs. $201). Both feature Costa's 580 lens technology and polarization, but the Broadbill II provides enhanced side coverage with its micro side shields and hooding—features specifically designed to block stray light and protect from the elements in extreme conditions. The Blackfin is known for fitting wider faces comfortably and is often recommended for anglers who prioritize all-day comfort with polycarbonate lenses. If you need maximum coverage and don't mind paying a bit more, the Broadbill II's specialized design delivers superior protection. If you want proven Costa performance at a better price point, the Blackfin is hard to beat.
Broadbill II vs. Costa Fathom 9058
The Costa Fathom 9058 sits in the same price range ($201-$285) and shares the rectangular wrap design that anglers prefer for fishing. Both are prescription-ready and feature the same 580 lens technology. The key difference is in the specific design details: the Broadbill II's vented nose pads and micro side shields make it particularly well-suited for humid conditions and all-day wear where fogging can be an issue. The Fathom offers a slightly different aesthetic and may fit certain face shapes better. If ventilation and fog prevention are priorities—especially if you fish in humid climates or move between air-conditioned spaces and the deck—the Broadbill II has the edge.
Broadbill II vs. Costa Saltbreak 9020
The Costa Saltbreak 9020 is another performance fishing frame in a similar price range ($193-$296) with full wrap coverage and 580 lens technology. The Saltbreak offers a different frame shape and styling that some anglers prefer for its distinctive look. Both provide excellent coverage and protection for water sports. Your choice between these two will largely come down to which frame shape fits your face better and which aesthetic you prefer. The Broadbill II's hybrid design with its specific side shields and vented nose pads makes it particularly versatile for both fishing and everyday wear, while the Saltbreak may appeal to those who want a different style profile.
Our recommendation: The Costa Broadbill II 9120 stands out for its thoughtful design details—the vented nose pads, micro side shields, and hooding—that make a real difference during long days on the water. If you're serious about fishing and want sunglasses engineered specifically for water environments with features that prevent fogging and block stray light, the Broadbill II justifies its price. For budget-conscious buyers who still want Costa quality, the Blackfin offers excellent value.
At a Glance
Costa Del Mar Fathom 9058 Sunglasses
Pros:
- Similar price range ($201-$285)
- Same 580 lens technology and polarization
- Rectangular wrap design for fishing
- Prescription-ready
Cons:
- May have different fit characteristics
- Different frame styling details
- Lacks the specific micro side shields and hooding of the Broadbill II
Costa Del Mar Blackfin 9014 Sunglasses
Pros:
- Lower starting price ($163.54 vs $201)
- Wider face fit
- Same 580 lens technology
- Lighter polycarbonate option popular for all-day wear
Cons:
- May not have the same level of side coverage
- Different frame geometry
- Less specialized for extreme water conditions
Costa Del Mar Saltbreak 9020 Sunglasses
Pros:
- Similar price range ($193-$296)
- Same 580 lens technology
- Designed for fishing and water sports
- Full wrap coverage
Cons:
- Different frame shape and styling
- May fit differently depending on face shape
- Different aesthetic that may not suit all preferences