Joybuy Insights

Buying sunglasses: how to choose UV protection, comfort and the right fit

Sunglasses should do more than just complement your outfit. Whether you’re driving, cycling or travelling, you’ll soon notice if the frames stay in place, reduce distracting reflections and are easy to carry around. However, product pages aren’t always easy to compare.

Three common pitfalls to watch out for:

  • UV400 is mentioned without further details about the lens or coating. Check that the product description clearly states what protection is offered.
  • Polarisation is confused with UV protection. Polarised sunglasses can reduce glare from surfaces such as wet tarmac or water, but polarisation is no substitute for a UV filter.
  • Lightweight frames aren’t automatically comfortable. The frame width, bridge and arm length all help determine how well the glasses fit.

Below, you’ll find the key specifications to look for, along with options for different uses.

What should you look for when buying sunglasses?

1. UV400 and lens information

UV400 refers to protection from ultraviolet light with wavelengths of up to 400 nanometres. When buying, look beyond the label and check the product details and stated lens materials too. The product specifications provided by several brands claim full or almost full UV400 protection. As this is information supplied by the manufacturer, treat these percentages as product claims rather than a general guarantee for every model.

A coating that reduces reflections, such as an anti-reflective coating, serves a different purpose. According to Beneunder’s product information, the FD421 has an OAR coating designed to reduce reflections. This can be useful for everyday outdoor wear and driving, but always check that the tint and light transmission suit your needs.

2. Polarisation and light transmission

Polarised sunglasses are particularly useful if you’re bothered by reflections from roads, water, glass or metal surfaces. According to the product description, Revoray cycling glasses use TAC polarised lenses with a visible light transmission of around 15.2 per cent. A lower light transmission generally means a darker lens.

A very dark lens isn’t always practical for driving. Polarisation can also make some displays or screens harder to read. So, if you’re looking for sunglasses for driving, it’s worth checking for:

  • an even tint without distracting distortion;
  • good visibility in changing light conditions;
  • frames that don’t unnecessarily restrict your peripheral vision;
  • clear manufacturer warnings and usage restrictions.

3. Fit, weight and material

TR90 sunglasses use a thermoplastic material that product descriptions associate with flexibility and low weight. This doesn’t automatically tell you how long they’ll last, but it may contribute to wearing comfort.

Before buying, check:

  • the frame and lens widths;
  • the bridge width;
  • the arm length;
  • the weight;
  • whether they have adjustable nose pads or non-slip details.

Lightweight sunglasses weighing 26 to 33 grams can be comfortable to wear for long periods. For sports, stability and ventilation are also more important than low weight alone.

Recommended sunglasses for different types of user

Ideal for: Budget-conscious first-time buyers
Beneunder FD421 folding sunglasses

Beneunder FD421, Oversized Foldable Sunglasses, UV400 & Anti-Glare Lenses

Why it suits this profile: An affordable choice for everyday wear, short drives and travel, when you want to keep a compact pair of sunglasses in your bag.

How this product avoids the pitfall

The product information lists UV400, an anti-reflective coating and a folding design. This makes the key details clearer than on a product page that only describes the style.

Key benefit & highlights

TR90 frame, weighing around 26 grams, with a stated folded thickness of 35 mm. Available in several colour options.

Ideal for: Buyers looking for premium quality
Ray-Ban Meta Wayfarer Gen1 smart AI glasses

Ray-Ban Meta Wayfarer - Gen1 AI Smart Glasses

Why it suits this profile: For anyone looking for sunglasses that also offer calling, audio, photo and voice-control features.

How this product avoids the pitfall

The features and limitations are clearly set out: a Meta AI app is required, battery life is up to four hours according to the product information, and the glasses work with iOS and Android.

Key benefit & highlights

12 MP camera, open-ear speakers, Bluetooth 5.2 and a charging case. Check first that the smart features suit the way you’ll use them.

Ideal for: Specialist use & frequent users
Revoray polarised cycling glasses

Revoray Cycling Glasses — HD TAC Polarized Lenses, Y1-Black

Why it suits this profile: Designed for cyclists and outdoor enthusiasts who value stability, polarisation and a sporty fit.

How this product avoids the pitfall

The description lists adjustable silicone nose pads, non-slip details and an ANSI Z87.1 performance rating. According to the product information, the glasses are impact-resistant, but they aren’t intended for high-impact work.

Key benefit & highlights

TAC polarised lenses, stated UV400 protection, TR90 frame and a weight of around 33 grams. The manufacturer also lists a water- and oil-repellent coating.

Ideal for: Travellers and commuters
Beneunder Boston folding sunglasses

Beneunder Boston-Style Folding Sunglasses FD01h

Why it suits this profile: A classic shape for everyday wear, with a folding design and adjustable parts for anyone who’s often on the go.

How this product avoids the pitfall

The product information lists UV400, anti-reflective properties, an oleophobic layer to resist fingerprints and scratch resistance. The adjustable arms and bridge help you fine-tune the fit.

Key benefit & highlights

TR90 frame, nylon lenses, three arm positions and a folded thickness of around 1.15 inch according to the specifications.

Looking for more options?

We’ve put together a full, up-to-date list of products that meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about sunglasses

Are polarised sunglasses suitable for driving?

They can be, particularly when dealing with reflections from wet roads or other surfaces. However, check that the lenses aren’t too dark and that you can still read displays clearly. Polarised lenses also don’t automatically provide UV400 protection, so look for both features separately in the specifications.

How long do sunglasses last?

Their lifespan depends on the hinges, coatings, how they’re used and how they’re stored. Keep them in a hard case, fold them according to the instructions and clean the lenses with a soft microfibre cloth. Replace your sunglasses if the lenses are deeply scratched or the frames no longer fit securely.

Are folding sunglasses useful for travel?

They are for many travellers. Folding sunglasses take up less room in a bag or coat pocket. However, take care of the hinges and use a protective case. A compact design is especially useful if you’ll be putting the glasses away and taking them out again frequently.