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The Costa Del Mar Los Alijos 9126 sunglasses bring minimalist design and serious performance together in one of the slimmest frames Costa has ever made. Built from ultra-thin Radel material, the Los Alijos features some of the thinnest cross-sections in the entire Costa lineup—giving you a clean, modern look that doesn't sacrifice durability or function on the water.
Costa 580 Lens Technology: Color, Clarity & Protection
Every pair of Los Alijos comes equipped with Costa's patented 580 lens technology, available in both glass (580G) and polycarbonate (580P) options. These aren't ordinary polarized lenses. Costa's 580 tech filters out harsh yellow light at 580nm on the visible spectrum, which naturally boosts reds, greens, and blues for enhanced color and sharper contrast. The result? You see more detail—whether you're scanning flats for tailing fish or just enjoying a day by the coast.
All Costa lenses block 100% of UVA, UVB, and UVC light, plus harmful high-energy blue (HEV) light that can cause long-term eye damage. The C-Wall coating adds scratch resistance and repels water, oil, and sweat for easy cleaning. Glass lenses deliver the best optical clarity and are virtually scratch-proof, while polycarbonate lenses are lighter, more impact-resistant, and better for active use. Both options deliver 99.9% polarization efficiency to eliminate glare off water and reflective surfaces.
Adjustable Fit & All-Day Comfort
The Los Alijos includes adjustable nose pads that let you dial in a custom, secure fit. Combined with Hydrolite rubber on the temple tips, these sunglasses stay put through sweat, spray, and movement. The rectangle shape and medium wrap offer solid coverage without feeling bulky, and the lightweight Radel frame means you can wear them all day without fatigue.
These sunglasses are prescription-ready, so if you need vision correction, you can add Rx lenses without compromising Costa's legendary optics. Available in 10 color combinations—from classic matte black with gray gradient to translucent deep blue with blue mirror—the Los Alijos adapts to your style and the conditions you fish or explore in.
Whether you're casting from the shore, paddling open water, or switching from performance gear to casual wear, the Costa Los Alijos delivers the clarity, protection, and fit that serious anglers and coastal enthusiasts demand.
Product Details
Product DetailsModel
06S9126Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
BlackColor Code
912603Color Description
Matte BlackLens Color
Gray GradientLens Features
polarized
Frame Color
BlackColor Code
912604Color Description
Matte BlackLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912601Color Description
Matte BlackLens Color
Blue MirrorLens Features
polarized
Frame Color
TortoiseColor Code
912606Color Description
TortoiseLens Color
Gold MirrorLens Features
polarized
Color Code
912608Color Description
Translucent Deep BlueLens Color
Blue MirrorLens Features
polarized
Frame Color
TortoiseColor Code
912605Color Description
TortoiseLens Color
GrayLens Features
polarized
Frame Color
BlackColor Code
912602Color Description
Matte BlackLens Color
Green MirrorLens Features
polarized
Color Code
912607Color Description
Translucent Deep BlueLens Color
GrayLens Features
polarized
Color Code
912609Color Description
Gray CrystalLens Color
Blue MirrorLens Features
polarized
Color Code
912612Color Description
Somos BlueLens Color
Copper GradientLens Features
polarized
Frame Color
BeigeColor Code
912613Color Description
Matte SandLens Color
GrayLens Features
polarized
Size Details
Size DetailsBridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
Bridge Width
18.00Temple Length
150.00Size
5918-150
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Frequently Asked Questions
Are Costa Los Alijos sunglasses prescription-ready?
Yes, the Costa Los Alijos 9126 sunglasses are prescription-ready. Most Costa frames can be outfitted with prescription lenses, including single vision and progressive options. You can add prescription lenses in both 580G glass and 580P polycarbonate materials, maintaining the same color enhancement and polarization technology.
What is the difference between Costa 580G and 580P lenses?
Costa 580G lenses are made of glass and offer the best optical clarity and scratch resistance, while 580P lenses are polycarbonate—lighter, more impact-resistant, and better for active use. Both provide the same 580 color enhancement technology, 100% polarization, and full UV protection. Glass is heavier but clearer; polycarbonate is more durable and versatile for everyday wear.
What makes the Los Alijos frame material special?
The Los Alijos is made from ultra-thin Radel material, which achieves some of the thinnest cross-sections in Costa's entire assortment. This gives the frame a lightweight, minimalist profile with a clean, modern look while maintaining the durability needed for coastal adventures and on-water performance.
Do Costa Los Alijos sunglasses have adjustable nose pads?
Yes, the Los Alijos features adjustable nose pads that allow you to customize the fit for maximum comfort and retention. The nose pads are made with Hydrolite material, which absorbs sweat and keeps the sunglasses secure and optically aligned even during active use on the water.
What lens colors are best for fishing and water sports?
For offshore and open water, blue mirror lenses are ideal for bright, full-sun conditions. Green mirror and copper lenses work best for inshore and freshwater fishing, enhancing contrast on flats. Gray lenses are the best all-around choice for everyday activities on and off the water. All Costa 580 lenses filter harsh yellow light and boost reds, greens, and blues for better clarity.
Are all Costa sunglasses polarized?
Yes, every single pair of Costa sunglasses is 100% polarized—it's standard, not optional. Costa only manufactures polarized sunglasses because filtering reflective glare is essential for anyone on the water or outdoors. All Costa lenses also provide 100% UV protection and block harmful high-energy blue light.
Compare With Similar Frames
How the Costa Del Mar Los Alijos 9126 Sunglasses stacks up against the closest alternatives we carry.
- Larger XL fit for bigger head sizes
- More rounded frame shape for a classic look
- Same 580 lens technology and polarization
- Medium fit for average head sizes
- More rounded, classic aesthetic
- Same 580 lens options and UV protection
- More fishing-specific features and coverage
- Same 580 lens technology and polarization
- Proven performance frame for serious anglers
Read the full comparison
Costa Los Alijos vs. Rincon vs. Rinconcito: Which Minimalist Frame Is Right for You?
If you're drawn to Costa's lifestyle frames, you're likely comparing the Los Alijos, Rincon, and Rinconcito. All three share Costa's legendary 580 lens technology, 100% polarization, and full UV protection—but they differ in fit, profile, and style.
Los Alijos: Ultra-Thin & Modern
The Los Alijos is Costa's slimmest lifestyle frame, made from ultra-thin Radel material that achieves some of the thinnest cross-sections in the lineup. It's lightweight, minimalist, and modern—perfect if you want a clean look that transitions easily from the water to casual wear. The adjustable nose pads let you dial in a custom fit, and the rectangle shape offers solid coverage without bulk.
Best for: Anglers and coastal enthusiasts who prioritize a sleek, modern aesthetic and lightweight comfort.
Rincon: XL Fit & Classic Style
The Rincon is Costa's larger lifestyle frame, designed for bigger head sizes. It has a more rounded appearance and a slightly bulkier profile than the Los Alijos. The Rincon is one of Costa's most popular frames, with a proven track record for all-day comfort and versatility. If you've struggled to find sunglasses that fit properly, the Rincon's XL sizing might be your answer.
Best for: Those with larger head sizes who want a classic, rounded frame with proven performance.
Rinconcito: Medium Fit & Versatility
The Rinconcito is the smaller sibling of the Rincon, offering a medium fit for average head sizes. It shares the Rincon's rounded aesthetic but in a more compact package. The Rinconcito is highly versatile—comfortable for backcountry fishing and stylish enough for everyday wear.
Best for: Medium-fit wearers who want a classic, versatile frame that works on and off the water.
Why Choose the Los Alijos?
If you value a minimalist, ultra-lightweight design with modern lines, the Los Alijos stands out. Its ultra-thin Radel construction makes it noticeably lighter and sleeker than the Rincon or Rinconcito, and the adjustable nose pads ensure a secure, custom fit. All three frames deliver the same world-class 580 lens technology, so your choice comes down to fit preference and style—classic and rounded (Rincon/Rinconcito) or slim and modern (Los Alijos).
At a Glance
Costa Del Mar Rincon 9018 Sunglasses
Pros:
- Larger XL fit for bigger head sizes
- More rounded frame shape for a classic look
- Same 580 lens technology and polarization
- Proven popular model with extensive reviews
Cons:
- Heavier and bulkier than the ultra-thin Los Alijos
- Less minimalist aesthetic
- Not as sleek or modern in profile
Costa Del Mar Rinconcito 9016 Sunglasses
Pros:
- Medium fit for average head sizes
- More rounded, classic aesthetic
- Same 580 lens options and UV protection
- Versatile for backcountry and lifestyle use
Cons:
- Not as thin or lightweight as Los Alijos
- Less modern, minimalist design
- Standard frame thickness vs. ultra-thin Radel
Costa Del Mar Tuna Alley 9009 Sunglasses
Pros:
- More fishing-specific features and coverage
- Same 580 lens technology and polarization
- Proven performance frame for serious anglers
- Available in prescription
Cons:
- Bulkier, less minimalist design
- Heavier than ultra-thin Los Alijos
- More tactical look, less versatile for casual wear