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The Costa Optical BRD 310 3015 eyeglasses bring the same adventure-ready DNA that made Costa a favorite among anglers and outdoor enthusiasts to your everyday prescription eyewear. Part of the Bimini Road collection—named after the mysterious underwater rock formation off the Bahamas—these semi-rimless rectangle frames combine lightweight durability with a clean, modern look that works from the office to the coast.
Premium Monel Construction Built for Active Lifestyles
The front frame is made from premium Monel, a nickel-copper alloy prized in eyewear for three key reasons: it's corrosion-resistant (so sweat, humidity, and salt air won't degrade it), it's flexible enough for opticians to fine-tune the fit, and it's strong without adding weight. The temples are injection-molded Bio-Resin with a distinctive topographical pattern inspired by ocean floor maps—a signature Costa Optical design detail that's both functional (better grip) and a nod to the brand's roots in on-the-water optics.
Integrated spring hinges flex to adapt to different face shapes while maintaining optical alignment, and adjustable rubber nose pads let you dial in a secure, comfortable fit. The semi-rimless design keeps the overall weight low and the profile sleek. Available in multiple colorways including Gunmetal, Pacific Blue, Black, and Rustic Bronze, and in 55mm and 57mm lens widths to fit a range of face sizes (the narrow-to-medium fit works well for slimmer profiles).
Prescription-Ready for Single Vision and Progressive Lenses
These frames are fully prescription-ready and compatible with single vision, progressive (no-line bifocal), and high-index lenses. The rectangle shape and 17mm bridge provide a stable platform for accurate lens mounting, and the durable construction means your prescription will stay properly aligned over time. Costa Optical was created specifically for people who need clear vision all day—not just under the sun—so whether you're reading charts, working at a screen, or navigating your next adventure, the BRD 310 delivers the clarity and comfort you need.
Measurements: 55-17-145 or 57-17-145 (lens width-bridge-temple length in mm). Rectangle frame shape. Semi-rimless design. Single bridge. Adjustable nose pads. Spring hinges. Prescription-ready.
Product Details
Product DetailsModel
06A3015Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
GunmetalColor Code
301503Color Description
Gunmetal
Color Code
301502Color Description
Pacific Blue
Frame Color
BlackColor Code
301501Color Description
Black
Frame Color
BrownColor Code
301507Color Description
Rustic Bronze
Frame Color
BrownColor Code
301507Color Description
Rustic Bronze
Frame Color
SilverColor Code
301508Color Description
Satin Silver
Frame Color
SilverColor Code
301508Color Description
Satin Silver
Size Details
Size DetailsBridge Width
17.00Temple Length
145.00Size
5517-145
Bridge Width
17.00Temple Length
145.00Size
5517-145
Bridge Width
17.00Temple Length
145.00Size
5517-145
Bridge Width
17.00Temple Length
145.00Size
5717-145
Bridge Width
17.00Temple Length
145.00Size
5517-145
Bridge Width
17.00Temple Length
145.00Size
5517-145
Bridge Width
17.00Temple Length
145.00Size
5717-145
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Frequently Asked Questions
Are the Costa Optical BRD 310 eyeglasses prescription-ready?
Yes, the BRD 310 frames are fully prescription-ready and can accommodate single vision, progressive (no-line bifocal), and high-index prescription lenses. Costa Optical frames are designed to work with a wide range of corrective vision needs, and these frames provide a stable platform for accurate lens mounting and long-term optical alignment.
What is Monel and why is it used in these frames?
Monel is a premium nickel-copper alloy used in the BRD 310's front frame. It's valued in eyewear for being corrosion-resistant (won't rust or degrade from sweat, humidity, or salt air), flexible (allows for precise fitting adjustments), and strong yet lightweight. This makes Monel frames ideal for active lifestyles and people who spend time outdoors or near water.
What size should I choose: 55mm or 57mm?
The BRD 310 is available in 55mm and 57mm lens widths, both with a 17mm bridge and 145mm temples. The 55mm is best for narrow to medium face shapes, while the 57mm offers slightly more coverage for medium faces. Costa describes this as a narrow fitting frame designed for those with slimmer head shapes. If you're between sizes, measure your current glasses or consult the size guide.
Do these frames have adjustable nose pads?
Yes, the BRD 310 features adjustable rubber nose pads that allow you to customize the fit for comfort and stability. The nose pads can be fine-tuned for better optical alignment and to prevent the frames from sliding during active wear. This is especially helpful for ensuring the frames sit properly on different nose bridge shapes.
What are the temples made of and what is the ocean floor design?
The temples are made from Bio-Resin (an eco-friendly injected plastic material) and feature a topographical map pattern inspired by the ocean floor. This design is a signature of Costa Optical's Bimini Road collection, which draws inspiration from famous underwater places. The textured pattern also provides better grip and comfort behind the ears.
Are Costa Optical frames durable enough for daily wear?
Yes, Costa Optical frames are built for durability and active lifestyles. The BRD 310 uses premium Monel metal (corrosion-resistant and strong), Bio-Resin temples, and integrated spring hinges that flex to adapt to your face while maintaining structural integrity. Costa was founded by fishermen in the 1980s and designs all eyewear to withstand demanding conditions, making these frames reliable for daily wear and outdoor activities.
Compare With Similar Frames
How the Costa Optical Brd 310 3015 Eyeglasses stacks up against the closest alternatives we carry.
- Full-rim construction may offer more durability for high prescriptions
- Different aesthetic—full acetate frame vs. semi-rimless metal
- May accommodate a wider range of lens types
Read the full comparison
Costa Optical BRD 310 vs. OCR 400: Semi-Rimless vs. Full-Rim
Both the BRD 310 and OCR 400 are prescription-ready frames from Costa Optical's collection, but they take different approaches to construction and style. The BRD 310 is a semi-rimless rectangle frame with a premium Monel metal front and Bio-Resin temples, offering a lightweight, minimalist look that's ideal for people who want a sleek profile and corrosion-resistant durability. The OCR 400, by contrast, is a full-rim frame (likely acetate or mixed material construction), which provides a bolder aesthetic and potentially more frame color and pattern options.
The semi-rimless design of the BRD 310 reduces weight and gives a more open, modern appearance—great for professional settings or anyone who prefers understated eyewear. The Monel construction is particularly valuable if you're active outdoors, sweat heavily, or live in humid or coastal environments, as it resists corrosion far better than standard metals. The BRD 310's spring hinges and adjustable nose pads also make it highly adaptable to different face shapes.
The OCR 400's full-rim construction may be preferable if you have a strong prescription (full rims can better hide thick lens edges) or if you simply prefer the look and feel of a complete frame around the lenses. Full-rim frames also tend to offer more color variety since the entire frame can be molded or layered in different hues and patterns.
Choose the BRD 310 if: You want a lightweight, corrosion-resistant semi-rimless frame with a clean, professional look and the durability to handle active wear and outdoor conditions.
Choose the OCR 400 if: You prefer a full-rim frame with a bolder presence, need maximum lens edge coverage for a strong prescription, or want more color and pattern options in your eyewear.
At a Glance
Costa Optical OCR 400 8014 Eyeglasses
Pros:
- Full-rim construction may offer more durability for high prescriptions
- Different aesthetic—full acetate frame vs. semi-rimless metal
- May accommodate a wider range of lens types
- Potentially more color and pattern options with acetate construction
Cons:
- Likely heavier than the semi-rimless BRD 310
- Full-rim frames can feel bulkier for some wearers
- May not have the same corrosion-resistant Monel construction
- Less minimalist look compared to the sleek BRD 310