Costa Del Mar Diego Polarized Sunglasses
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Built for All-Day Performance on the Water
The Costa Del Mar Diego is Costa's most advanced sport performance sunglass, engineered for anglers and water sports enthusiasts who demand all-day comfort without sacrificing optical clarity. An innovative vented spring hinge system maximizes airflow around the temples while sweat management channels wick moisture away to keep you cool and focused. Flexible, strap-ready temple tips mean Diego stays put however hard you push, and integrated top and side shield details block peripheral light leak so nothing interrupts your sight picture on the water.
At the core of every Diego is Costa's polarized 580 lens technology, which filters the specific wavelengths of yellow light that cause eye fatigue and enhances the reds, greens, and blues your eyes use to read water structure. Every lens delivers 100% UV protection.
580G Glass vs. 580P Polycarbonate: Choosing Your Lens
Diego is offered in two distinct lens materials, each suited to a different fishing style and budget. The comparison below covers the key differences so you can pick the right tool for your water.
| Feature | 580G (Glass) | 580P (Polycarbonate) |
|---|---|---|
| Optical clarity | Highest , glass delivers the sharpest, most distortion-free view | Excellent , lighter weight with strong optical performance |
| Weight | Heavier than polycarbonate | Lighter, easier to wear all day |
| Impact resistance | More scratch-resistant surface | Higher impact resistance |
| Best for | Sight fishing, offshore, technical flats work where optical precision matters most | Active use, kayak fishing, high-movement water sports |
Frame Design and Fit
Diego's wide frame is built for a broad face with XL coverage, wrapping forward enough to eliminate light from the sides without feeling like a sealed goggle. The vented spring hinge is the defining structural feature: it allows the temples to flex outward for a secure fit on wider heads while the ventilation channels reduce the heat buildup that causes fatigue on long sessions. The non-adjustable nosepad keeps the frame stable, and the Base 8 Decentered lens curve brings the optics close to the face to minimize edge distortion across a wide field of view.
Temple tips are designed to accept a sunglass strap or retainer, making Diego ready for offshore work, paddling, or any activity where you cannot afford to lose your eyewear over the side.
580 Lens Technology Explained
Costa's 580 lens blocks yellow light at the 580 nanometer wavelength, the range that causes the most visual noise and eye fatigue in bright outdoor conditions. The result is enhanced contrast across the spectrum anglers rely on: deeper reds at low light, richer greens when reading grass beds, and sharper blue tones for reading open water. This is color enhancement through selective filtration, not artificial tinting, so what you see is a more accurate version of what is actually there. All 580 lenses are polarized to cut surface glare and deliver 100% protection against UVA, UVB, and UVC radiation.
Shop Diego at Island Water Sports
The Costa Del Mar Diego is stocked in store and online at Island Water Sports. Costa's South Florida roots run deep, and the Diego lineup reflects that heritage, designed for the same inshore and offshore conditions that define fishing in this region. Use the variant picker above to select your lens and frame combination.
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Specifications
- Brand
- Costa Del Mar
- Model
- Diego
- Lens technology
- Costa 580 polarized (color-enhancing, 100% UV protection)
- Lens materials
- 580G (polarized glass) and 580P (polarized polycarbonate)
- Lens curve
- Base 8 Decentered
- Polarization
- Yes
- Frame fit
- Wide
- Frame size
- XL
- Hinge system
- Vented spring hinge with sweat management channels
- Nosepad adjustable
- No
- Temple tips
- Flexible, strap-ready
- Light management
- Top and side shield details to eliminate light leak
- Gender
- Men's
- MPN
- itemMatrix-15336
Frequently Asked Questions
- Are the Costa Del Mar Diego sunglasses polarized?
- Yes. Every Diego lens uses Costa's 580 polarized technology, which eliminates surface glare and delivers 100% UVA, UVB, and UVC protection. Polarization is standard across the entire Diego lineup.
- What is the difference between the Costa Diego 580G and 580P lenses?
- 580G lenses are made from optical glass and offer the sharpest, most distortion-free view, making them the choice for sight fishing and technical applications where precision matters most. 580P lenses are polycarbonate, which is lighter and more impact-resistant, making them well-suited for active use and high-movement water sports. Both use the same 580 color-enhancing polarized technology and deliver 100% UV protection.
- What does Costa 580 lens technology do?
- Costa 580 lenses selectively block light at the 580 nanometer wavelength, the yellow band that causes visual noise and eye fatigue. By filtering this range, 580 lenses enhance contrast and color accuracy across reds, greens, and blues, giving anglers a clearer read of water structure without altering what is actually there. All 580 lenses are also polarized to cut glare off the water surface.
- Can the Costa Diego be used with a sunglass strap or retainer?
- Yes. The Diego's temple tips are specifically designed to be strap-ready, so you can attach a standard retainer or leash cord. This makes them a solid choice for offshore fishing, kayaking, or any activity where losing your sunglasses over the side is a real risk.
- What kind of fit does the Costa Diego have?
- The Diego is built on a wide frame in an XL size with a wraparound profile. The vented spring hinges allow the temples to flex outward, accommodating broader faces while maintaining a secure hold. The lens curve (Base 8 Decentered) brings the lenses close to the face to minimize peripheral distortion.
- How does the Diego manage heat and sweat during long sessions?
- The Diego's vented spring hinge system is engineered with open channels that allow airflow around the temples. Dedicated sweat management channels wick moisture away from the face, which reduces heat buildup and keeps the frame from slipping during extended wear in warm conditions.
- Where can I buy Costa Del Mar Diego sunglasses?
- Costa Del Mar Diego sunglasses are available in store and online at Island Water Sports in South Florida. Use the variant picker on this page to choose your lens material, lens tint, and frame combination.