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The Costa Del Mar Paunch XL 9050 sunglasses bring surf-inspired style and serious optical performance to your days on and off the water. Named after the legendary surf break in the Bocas del Toro archipelago of Panama, these square polarized sunglasses for men deliver the XL fit that anglers, surfers, and outdoor enthusiasts with wider faces have been asking for.
Costa 580 Lens Technology: See the Difference
Every pair of Paunch XL sunglasses features Costa's proprietary 580 lens technology—the innovation that filters harmful light at 580 nanometers to enhance reds, greens, and blues while cutting harsh yellow light and absorbing high-energy visible (HEV) blue light. The result is sharper contrast, reduced haze, and colors that pop whether you're scanning the flats for tailing fish or watching the horizon from the beach.
You can choose between two lens materials. 580G glass lenses offer superior optical clarity and are virtually scratch-proof, with mirrors encapsulated between layers of glass—ideal if you prioritize the crispest vision and maximum durability. 580P polycarbonate lenses are lighter and more impact-resistant, featuring Costa's C-Wall coating for added scratch protection. Both deliver 100% UV protection and 99.9% polarization efficiency to kill reflected glare.
Built for the Water, Ready for Anything
The Paunch XL frame is constructed from Costa's eco-friendly Bio-Resin material—lightweight, durable, and designed to hold its shape through salt spray, sweat, and sun. Integrated metal hinges provide lasting strength, while the textured Hydrolite nose pads and temple tips actually grip better when wet, so your sunglasses stay put during long days on the boat or in the surf. Interior temple sculpting inspired by boat hull strakes adds a subtle design detail that nods to Costa's roots in the fishing world.
The wide, square lens shape provides excellent coverage and a modern look that works equally well at the dock or downtown. The Paunch XL is prescription-ready, so you don't have to choose between clear vision and sun protection.
Available in multiple colorways including matte black, havana tortoise, and fog gray frames paired with lens options ranging from green mirror and blue mirror to copper silver mirror and gray—each optimized for different light conditions and activities.
Product Details
Product DetailsModel
06S9050Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
TortoiseColor Code
905007Color Description
HavanaLens Color
Copper Silver Mirror 580p
Frame Color
BlackColor Code
905002Color Description
BlackLens Color
Green Mirror 580p
Frame Color
BlackColor Code
905003Color Description
BlackLens Color
Gray 580p
Frame Color
TortoiseColor Code
905006Color Description
HavanaLens Color
Green Mirror 580g
Color Code
905005Color Description
GreyLens Color
Gray 580g
Frame Color
BlackColor Code
905001Color Description
BlackLens Color
Blue Mirror 580g
Color Code
905008Color Description
GreyLens Color
Gray Gradient
Color Code
905004Color Description
Fog GrayLens Color
Blue Mirror
Frame Color
BlackColor Code
905009Color Description
BlackLens Color
Gold MirrorLens Features
polarized
Size Details
Size DetailsSize
5918-145
Size
5918-145
Size
5918-145
Size
5918-145
Size
5918-145
Size
5918-145
Bridge Width
18.00Temple Length
145.00Size
5918-145
Bridge Width
18.00Temple Length
145.00Size
5918-145
Bridge Width
18.00Temple Length
145.00Size
5918-145
These fit my big head perfectly!
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Frequently Asked Questions
What is the difference between Costa 580G and 580P lenses?
580G lenses are made of glass and provide superior optical clarity and scratch resistance, with mirrors encapsulated between glass layers. 580P lenses are polycarbonate—lighter, more impact-resistant, and about $50 less expensive. Both offer the same 580 color-enhancing technology, 100% UV protection, and 99.9% polarization efficiency. Choose 580G for maximum clarity and durability, or 580P for lighter weight and impact protection.
Are Costa Paunch XL sunglasses available with prescription lenses?
Yes, the Costa Paunch XL 9050 is prescription-ready and can be fitted with prescription lenses in both 580G glass and 580P polycarbonate materials. The frame accommodates single vision prescriptions, making it an excellent choice if you need vision correction for water sports, fishing, or everyday outdoor activities.
What size are the Costa Paunch XL sunglasses?
The Paunch XL has a 59mm lens width, 18mm bridge width, and 140mm frame width total. Costa describes this as a wide or XL-XXL fit designed for those with larger head sizes or anyone who prefers more coverage. It's slightly larger than the standard Paunch model, offering the same features in a more generous fit.
What is Costa's Hydrolite material?
Hydrolite is Costa's proprietary hypoallergenic rubber used on nose pads and temple tips. It's designed to absorb sweat and actually increase grip when wet, keeping your sunglasses secure and comfortable during active use. This makes the Paunch XL ideal for fishing, boating, and water sports where moisture and movement are constant.
Do Costa Paunch XL sunglasses have 100% UV protection?
Yes, all Costa lenses provide 100% UV blockage for maximum protection against harmful ultraviolet light. The 580 lens technology goes beyond basic UV protection by also filtering high-energy visible (HEV) blue light and harsh yellow light, reducing eye strain and providing superior light management for long days outdoors.
What is the Costa Paunch XL frame made of?
The Paunch XL frame is made from Costa's Bio-Resin material—a lightweight, durable, and eco-friendly acetate that retains its shape under tough conditions. The frame features integrated metal hinges for strength and longevity, plus textured Hydrolite rubber on the nose pads and temple tips for a secure, comfortable fit even when wet.
Compare With Similar Frames
How the Costa Del Mar Paunch Xl 9050 Sunglasses stacks up against the closest alternatives we carry.
- Similar price point ($179-$296)
- Square lifestyle frame design
- Available in 580G and 580P lens options
- Similar price point ($199-$296)
- Square frame design
- 580 lens technology available
Read the full comparison
Costa Del Mar Paunch XL vs. Other Costa Square Frames
If you're considering the Costa Paunch XL 9050, you might also be looking at other Costa square lifestyle frames. Here's how the Paunch XL compares to similar models in our collection.
Paunch XL vs. Rincon 9018
The Costa Rincon 9018 ($179-$296) shares the Paunch XL's square shape, Bio-Resin frame construction, and 580 lens technology. Both are lifestyle-focused frames that work equally well on the water and around town. The key difference is fit: the Paunch XL is specifically designed as a wide/XL fit with a 59mm lens and 140mm frame width, making it the better choice if you have a larger head or prefer maximum coverage. The Rincon may offer a more standard fit profile. Both frames feature Hydrolite nose pads and temple tips for secure, comfortable wear.
Paunch XL vs. Bloke 9045
The Costa Bloke 9045 ($179-$280) is another square lifestyle frame with similar pricing and technology. Like the Paunch XL, it features Costa's Bio-Resin construction and is available with both 580G glass and 580P polycarbonate lenses. The Bloke offers a different aesthetic and may have a different fit profile—if you need the XL sizing and wide fit that the Paunch XL provides, that's the deciding factor. Both deliver the same exceptional 580 lens performance and polarization.
Paunch XL vs. Fisch 9054
The Costa Fisch 9054 ($199-$296) rounds out Costa's square lifestyle frame lineup with similar construction and lens options. The Fisch shares the Paunch XL's eco-friendly Bio-Resin material and 580 technology, but with its own distinct style. If you're drawn to the surf-inspired design of the Paunch XL—named after the famous Bocas del Toro break—and need the XL fit dimensions, the Paunch XL is your frame. If fit is less critical and you prefer the Fisch aesthetic, either will deliver Costa's legendary optical performance.
Why choose the Paunch XL? If you need a wide fit, want maximum coverage, or simply prefer the larger look of XL frames, the Paunch XL delivers Costa's best lens technology in a size that actually fits. The 59mm lens and 140mm frame width make it one of Costa's most generous lifestyle frames, and the Bocas del Toro surf heritage gives it authentic water-culture credibility.
At a Glance
Costa Del Mar Rincon 9018 Sunglasses
Pros:
- Similar price point ($179-$296)
- Square lifestyle frame design
- Available in 580G and 580P lens options
- Bio-Resin frame with Hydrolite components
Cons:
- May have different fit dimensions than Paunch XL
- Not specifically designed as an XL/wide fit model
- Different aesthetic inspired by different location
Costa Del Mar Bloke 9045 Sunglasses
Pros:
- Similar price range ($179-$280)
- Square frame shape
- Costa 580 lens technology
- Lifestyle-focused design
Cons:
- Different fit profile—may not offer XL sizing
- Different style aesthetic
- May have different bridge and temple dimensions
Costa Del Mar Fisch 9054 Sunglasses
Pros:
- Similar price point ($199-$296)
- Square frame design
- 580 lens technology available
- Bio-Resin construction
Cons:
- Different design inspiration and aesthetic
- May not offer the same XL fit dimensions
- Different colorway options