Costa Del Mar Keramas Polarized Sunglasses
Named for a Legend, Built for the Water
The Keramas takes its name from one of Indonesia's most celebrated reef breaks, and the frame lives up to that billing. Sharp, bold, and distinctly architectural, it belongs to Costa Del Mar's premium Del Mar collection, a line reserved for handcrafted Bio-Acetate frames paired exclusively with 580 Glass lenses. This is the top tier of Costa's optical lineup, and the Keramas earns its place in it.
580G Polarized Glass Lens Technology
Costa Del Mar polarized sunglasses built on the 580G platform deliver optical performance that polycarbonate cannot match. The "580" refers to Costa's proprietary color enhancement spectrum, and the "G" designates genuine glass construction. That combination does three specific things to the light reaching your eyes:
- Absorbs Harmful High-Energy Blue Light (HEV) - The lens blocks the high-energy violet and blue wavelengths associated with eye fatigue and long-term retinal stress, reducing glare and strain on the water, the sand, or behind the wheel.
- Enhances Reds, Greens, and Blues - Rather than flattening the visible spectrum, 580G selectively amplifies color contrast, making it easier to spot structure beneath the surface, read water texture, and see detail in low-contrast conditions.
- Filters Out Harsh Yellow - Yellow wavelengths are the primary driver of the washed-out "glare haze" effect common with conventional lenses. The 580G spectrum removes them, restoring clean, natural contrast.
Glass is heavier than polycarbonate but optically superior: it is inherently scratch resistant, holds its optical clarity longer, and eliminates the slight distortion present in most plastic lenses. For anyone spending serious time on the water or in bright coastal conditions, the weight trade-off is worthwhile.
Bio-Acetate Frame Construction
The Keramas frame is handmade from Bio-Acetate, a plant-derived cellulose acetate that replaces petroleum-based plastics with a material sourced from sustainably managed cotton and wood pulp. Bio-Acetate is stiffer and more dimensionally stable than standard acetate, holds its shape under heat, and has a richer depth and luster than injection-molded plastic. The result is a frame that looks as considered as it performs.
The design itself features a sharp square lens shape with a light top-to-bottom taper and a subtle keyhole bridge. The lens curve is Base 6, which provides moderate wrap and keeps peripheral vision clean without the aggressive curvature of dedicated sport frames. The fit is wide, making the Keramas a comfortable all-day wear for wider face profiles.
Del Mar Collection
The Del Mar collection is Costa's handcrafted premium tier. Every frame in the line is made by hand, and every lens is 580 Glass, not polycarbonate. The Keramas is exclusive to this collection, which means it is not offered in a plastic lens version. If you want the Keramas frame, you get 580G glass, full stop.
What You Get
Costa Del Mar sunglasses ship with a protective hard case, a cleaning cloth, and a warranty card. The case is durable enough for travel and keeps the glass lenses protected when the frames are not on your face.
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Specifications
- Model
- Keramas
- Collection
- Del Mar
- Item Number
- 6S2015 201501 54-19
- Frame Material
- Bio-Acetate (handmade)
- Lens Material
- Polarized Glass (580G)
- Lens Curve
- Base 6
- Frame Fit
- Wide
- Polarized
- Yes
- HEV Blue Light Absorption
- Yes
- Color Enhancement
- 580 spectrum (enhances reds, greens, blues; filters harsh yellow)
Frequently Asked Questions
- Are Costa Del Mar sunglasses polarized?
- Yes. All Costa Del Mar sunglasses are polarized, including the Keramas. Polarization eliminates horizontally reflected glare from water, sand, and pavement, which is why the brand was built around fishing and watersports use.
- What does the 580G lens designation mean on Costa Del Mar sunglasses?
- 580G means the lens uses Costa's 580 color-enhancement spectrum and is made from genuine glass. The 580 spectrum absorbs harmful HEV blue light, enhances reds, greens, and blues, and filters harsh yellow. The G indicates glass construction, which is optically clearer and more scratch resistant than polycarbonate.
- What is Costa Del Mar?
- Costa Del Mar (Spanish for "Coast of the Sea") is an American manufacturer of polarized sunglasses founded and based in Florida. The brand was built for anglers and watersports enthusiasts and is best known for its 580 lens technology and handcrafted Bio-Acetate frames in the Del Mar collection.
- What does Costa Del Mar mean in English?
- Costa Del Mar translates from Spanish as "Coast of the Sea" or "Sea Coast." The name reflects the brand's roots in coastal fishing and watersports culture.
- What is the Keramas frame fit like?
- The Keramas is designed with a wide fit, making it well suited for wider face profiles. The sharp square shape and Base 6 lens curve provide moderate wrap for peripheral coverage without the aggressive curvature of dedicated sport frames.
- What is Bio-Acetate and why does it matter?
- Bio-Acetate is a plant-derived cellulose acetate made from sustainably managed cotton and wood pulp rather than petroleum-based plastics. It is stiffer, more dimensionally stable, and has a richer optical depth than injection-molded plastic frames. Costa uses it exclusively in the handcrafted Del Mar collection.
- Does the Costa Del Mar Keramas come with a case?
- Yes. Costa Del Mar sunglasses include a protective hard case and a microfiber cleaning cloth. The hard case is designed to protect glass lenses during storage and travel.