Joybuy Insights

Buying sunglasses: how to choose UV400 protection, comfort and the right design

Sunglasses should do more than complement your outfit. In the Netherlands, bright sunshine, cloud cover and reflections on wet roads can quickly alternate. If you focus only on colour or brand name, you could end up with a pair that feels too heavy, scratches easily or provides insufficient information about lens protection.

Three common pitfalls are:

  • Confusing a dark appearance with UV protection. Dark lenses do not automatically mean that UV radiation is being adequately blocked. Look for clear information such as UV400.
  • Choosing a large frame without checking the measurements. Oversized sunglasses can look stylish, but a bridge that is too wide or arms that are too long may slip while cycling, driving or walking.
  • Treating foldability as a guarantee of durability. Foldable sunglasses are convenient for travelling, but hinges require careful handling. Check how compact the model becomes and how it should be stored.

The key features to look for in sunglasses

1. UV400 and lens information

The designation UV400 sunglasses refers to protection against UV radiation up to 400 nanometres. Always check that this information is actually included in the product description. Manufacturers may also state percentages. For the Beneunder models, these percentages are provided by the manufacturer: according to the brand’s own information, the FD421 blocks at least 99.9% of UV radiation and the FD315 at least 99.8%.

These are product specifications from the brand description, not independent measurements. Use them as a point of comparison and also check the information about compliance, lens category and usage advice.

2. Anti-reflection and driving

According to the product description, anti-reflective sunglasses can help reduce distracting reflections from surfaces. This is relevant around water, windows and wet tarmac. According to the manufacturer’s own claims, the Beneunder FD421 features an OAR coating that reduces glare by at least 99.6%. For the FD315, a reflection reduction of at least 99.8% is stated.

For sunglasses for driving, fit, clear vision and a tint that is not too dark are just as important. Sunglasses are no substitute for attentive driving. Also check whether the model you choose is suitable for driving at dusk or in tunnels.

3. Weight, size and fit

Lightweight sunglasses are often more comfortable to wear during long days outdoors. According to the product information, the FD421 weighs 26 grams and folds down to approximately 35 millimetres thick. The FD315 features a TR90 frame, air-cushion nose pads and soft arms. These features are particularly useful if you wear sunglasses for several hours at a time.

Pay attention to the measurements as well. On a pair of glasses, for example, 50-22 indicates a lens width of 50 mm and a bridge width of 22 mm. Ray-Ban Meta models are available in sizes including 50-22 and 53-22. Compare these figures with an existing pair of glasses or use the face-width method shown on the product page.

Recommended models for different uses

Suitable for: Budget-conscious beginners
Beneunder FD421 oversized foldable sunglasses

Beneunder FD421 Oversized Foldable Sunglasses

Why it suits this profile: This model combines an oversized shape with a foldable design, making it practical for everyday use, driving and travelling.

How this product avoids the pitfall

The product information mentions UV400 protection, anti-reflection, a weight of 26 grams and a folded thickness of 35 mm.

Key benefit & advantages

TR90 frame, nylon lenses, tri-fold design and a choice of several colours.

Suitable for: Buyers looking for premium quality
Beneunder Boston-Style Folding Sunglasses FD01h

Beneunder Boston-Style Folding Sunglasses FD01h

Why it suits this profile: The Boston shape is ideal for anyone looking for a classic frame with adjustable components and additional lens coatings.

How this product avoids the pitfall

The product description mentions UV400, anti-reflection, oleophobic and scratch-resistant coatings, as well as adjustable arms.

Key benefit & advantages

TR90 frame, foldable design, butterfly nose pads and a weight of approximately 27.5 grams.

Suitable for: Specific uses & intensive users
Ray-Ban Meta Wayfarer Gen1 AI smart glasses

Ray-Ban Meta Wayfarer Gen1 AI Smart Glasses

Why it suits this profile: For tech enthusiasts who want to combine Wayfarer sunglasses with hands-free control, a camera and open-ear audio.

How this product avoids the pitfall

The required app, compatibility and battery life are clearly stated. This means you know in advance that you need a phone and the Meta AI app.

Key benefit & advantages

12 MP camera, five microphones, Bluetooth 5.2, open-ear speakers and up to four hours of battery life according to the product information.

How to look after foldable sunglasses

Only fold the sunglasses at the hinges intended for this purpose. After use, place them in the supplied case and clean the lenses with a soft microfibre cloth. Avoid using paper tissues and keeping loose objects in the same bag. With a coated model, incorrect cleaning can cause visible wear to appear sooner.

If you are buying cat-eye sunglasses, Boston sunglasses or oversized sunglasses, it is worth comparing the frame width with an existing pair. A trendy shape is only practical when the bridge and arms sit securely.

Looking for more options?

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

Frequently asked questions about sunglasses

Is UV400 sufficient for everyday use?

UV400 indicates that the lenses should block UV radiation up to 400 nanometres, according to the product designation. Also check the available compliance and usage information. A dark lens without a clear UV400 statement does not automatically provide certainty.

Which sunglasses are suitable for driving?

Choose a model that stays securely in place, does not cause distracting reflections and is not too dark for changing conditions. According to the product description, anti-reflection can help reduce glare. Always check the lens category and follow the rules of the road.

How long do foldable sunglasses last?

This depends on usage, hinges, coatings and storage. Fold the sunglasses gently, do not press on the lenses and use a case. A model with a scratch-resistant coating can be practical, but no coating makes lenses immune to damage.