Every pair of sunglasses claims UV protection. It's the bare minimum — the equivalent of a restaurant advertising that they cook with heat. The real question is what separates a pair you'll wear for a season from one you'll keep for years.
Here's what actually matters.
Lens Material
The two main players are glass and polycarbonate. Glass lenses offer superior optical clarity — colors look truer, edges stay sharper, and they resist scratching far better than plastic. The trade-off is weight and shatter risk.
Polycarbonate is lighter and more impact-resistant, which makes it the better choice for sport or active wear. But optical quality is noticeably lower, and they scratch more easily without coatings.
If you're buying sunglasses primarily for style and daily wear, glass wins. For activity, polycarbonate wins.
Polarization
Polarized lenses reduce glare from reflective surfaces — water, roads, car hoods, snow. They don't make lenses "darker." They filter horizontal light waves that cause that blinding, washed-out effect on bright days.
Worth it for driving and outdoor wear. Less critical for casual, around-town use. One caveat: polarized lenses can interfere with LCD screens, so checking your phone through them can look odd.
Coatings
This is where cheap and expensive sunglasses diverge most. Quality coatings include:
Anti-reflective coating on the backside of the lens prevents light bouncing off the inner surface into your eyes — a surprisingly common and annoying issue with uncoated lenses.
Oleophobic coating repels fingerprints and oils, keeping lenses cleaner longer.
Hydrophobic coating sheds water, which matters more than you'd think on rainy days or near the coast.
No single coating is a dealbreaker, but the combination of all three is what makes a premium pair feel premium.
Frame Material and Hinge Quality
Acetate frames are the standard for quality eyewear — they're durable, hypoallergenic, and take color beautifully. Cheap sunglasses use injection-molded plastic that looks similar but feels hollow and brittle.
Hinges matter too. Spring hinges flex outward slightly, reducing pressure on your temples and extending the frame's lifespan. Fixed hinges are cheaper to produce but less forgiving on fit.
The Weight Test
Pick up a quality pair and a cheap pair. You'll feel the difference immediately. Good sunglasses have a balanced, solid weight — not heavy, not flimsy. They feel planted on your face without squeezing.
What You're Really Paying For
It's not the logo. It's lens clarity, coating durability, frame material, and hinge engineering. A $400 pair from an independent brand will almost always outperform a $400 pair from a fashion conglomerate using the same licensed factory.
Buy for the build. Skip the badge.