Costa Bayside Replacement Lenses by Revant Optics

	Standard	Standard Polarized	Elite Polarized
Impact Resistant Meets the ANSI Z80.3 impact resistance standard	Yes	Yes	Yes
100% UV Protection Keeps eyes safe from all damaging UVA, UVB, and UVC rays.	Yes	Yes	Yes
Scratch Resistant Protective surface coating	Yes	Yes	Yes
Fits Multiple Brands/Styles 1000’s of configurations to replace or upgrade your lenses	Yes	Yes	Yes
1 Year Warranty Protection against defects	Yes	Yes	Yes
Polarized Blocks glare from reflective surfaces like water and pavement to help ease eye strain.	No	Yes	Yes
Water & Oil Repellent Keeps vision clear in high-activity moments	No	No	Yes

Every lens color is designed for specific light conditions. Compare tint, VLT, and ideal conditions to find your match.

Lens	Base Tint	VLT "VLT" or Visible Light Transmission refers to the percentage of visible light that passes through the lens and reaches your eyes.	Ideal Conditions
Stealth Black	Gray	12%	Bright Sun
Dark Brown	Brown	15%	Bright Sun
Gray Green	Gray Green	13%	Bright Sun
Crystal Clear	Clear	90%	Low Light
Adapt Gray Photochromic	Clear/Gray	16-88%	Mixed Conditions
Midnight Sun MirrorShield	Gray	14%	Bright Sun
Fire Red MirrorShield	Brown	13%	Bright Sun
Rose Gold MirrorShield	Brown	13%	Bright Sun
Flare Gold MirrorShield	Brown	11%	Bright Sun
Emerald Green MirrorShield	Brown	11%	Bright Sun
Ice Blue MirrorShield	Gray	11%	Bright Sun
Tidal Blue MirrorShield	Gray	15%	Bright Sun
Plasma Purple MirrorShield	Gray	15%	Bright Sun
Black Chrome MirrorShield	Gray	13%	Bright Sun
Titanium MirrorShield	Gray	12%	Bright Sun
Flash Bronze MirrorShield	Brown	20%	Mixed Conditions

We’ll email you a copy of your personalized recommendations.

Replacement Lenses That Don't Feel Like Replacements

Polarized for the Win

Life can be polarizing, but polarized sunglasses aren't. They reduce glare so you see the good times better.

You Only Get One Set of Eyes

Our replacement lenses protect against 100% of those damaging UVA and UVB rays. No staring contests with the sun though.

Tough Enough for Spicy Stuff

We've put our lenses through all kinds of science-y tests and a few not so science-y ones too.

Revant Replacement Lenses for Stealth Black

Make your old Costa Bayside lenses like new with our replacement lenses for Costa sunglasses. These lenses perfectly fit Costa Bayside sunglasses with the model number BAY found on the inner side of the temple arm. And because our lenses meet or exceed the quality of your original Bayside lenses, you'll get the same performance you've come to expect.

Stealth Black features a neutral gray view-through that preserves natural color while cutting reflected glare from pavement, water, and snow. It delivers sharper clarity and reduced eye strain for driving, beach days, stadium events, and extended time in bright sun.

Other Features We Like to Nerd-Out About

Best for bright light (12% light transmission)
Neutral tint looking through the lens
Oleophobic coating: repels oil and smudges
Lens material: optical polycarbonate

Comes With

1 pair of replacement lenses (left & right) for your Costa Bayside sunglasses
Protective microfiber bag for storage and cleaning
Costa Bayside lens care instructions
Note: sunglass frame not included

Better Performance.
Half the Price.

Revant
Lenses

Starting at

$24.99

Polarized Available

UV Protection

Impact Resistant

Optically Corrected

Anti-Reflective Available

60-Day Trial

Costa
Lenses

Starting at

$44.00

Polarized Available

UV Protection

Impact Resistant

Optically Corrected

New Costa
Sunglasses

Starting at

$160.00

Polarized Available

UV Protection

Impact Resistant

Optically Corrected

Do I Really Need Polarized Sunglasses?

Polarization cuts glare, increases visibility, and lets you see underwater. In short, it helps you do the things you love better. And once you’ve taken that hairpin without getting blinded or looked a fish straight in the eye, you’ll never go back.

Unmatched Quality

We don’t know everything, but we know lenses. The last ten years have been all about testing, testing, testing. Every single material, coating, and manufacturing method has been evaluated. Only the best are used for our lenses.

High Impact Resistance
Polarized to Block Glare
100% UV Protection

About Our Testing

Find replacement lenses for any activity

A Color for Every Activity

It makes a difference and there are a lot of them. So we put together a short quiz to help you decide.

Questions About Replacing Your Costa Bayside Lenses?

Can I replace the lenses in my sunglasses?

Yes, most name-brand sunglasses have lenses that can be replaced. Revant lenses are custom-cut for specific frame models and include installation instructions. In most cases, you can replace the lenses at home in under two minutes.

How do I know if Revant lenses will fit my frame?

Check the model name or number printed on the inside temple of your sunglasses. Revant lenses are made for exact frame models, not just similar styles. If the model on your frame matches the one listed on our product page, you’ll get a perfect fit.

If you're unsure or don't see a model name or number, contact us and we can help make sure you get the right lenses for your sunglasses.

What’s the difference between Revant lenses and my original lenses?

Revant lenses are aftermarket, not OEM, but they’re engineered to meet or exceed the performance of original lenses. Each lens is traced from the original frame model using high-precision digital scanners that capture its unique curvature and edge geometry down to fractions of a millimeter. That means you get a lens cut to fit your frame exactly. No guesswork, no gaps, and no rattle.

Beyond fit, Revant lenses are tested for optical clarity, impact resistance, and durability. We also offer upgrades like polarization, MirrorShield® tints, anti-reflective coatings, and hydrophobic layers that go beyond what many stock lenses provide.

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Limited Edition

Keeper™ Lite Sunglass Case

Costa Bayside Replacement Lenses by Revant Optics