Joybuy Insights

Choosing sunglasses without regret: look for UV400, fit and smart features

Sunglasses should do more than look good. Whether you are cycling, driving, travelling or walking, lens quality, fit and wearability all affect how much you enjoy using them. Yet many consumers buy based solely on colour or frame shape. This can result in glasses that slip down, scratch easily or look attractive but offer little practical information.

The most common pitfalls when buying sunglasses are:

  • A vague protection claim: “UV protection” does not always specify the level provided. Look for a clear indication such as UV400 and check the product information.
  • The wrong size: oversized sunglasses can be too wide, while a narrow frame may press behind your ears. Check the lens width, bridge width and temple length.
  • Marketing around coatings: anti-reflective, polarised and scratch-resistant are different features. According to the product specification, anti-reflective sunglasses reduce reflections, but that does not automatically make every lens suitable for every situation.
  • Smart features without checking the requirements: AI glasses or sunglasses with a camera are only practical if the smartphone, app and battery life suit the way you intend to use them.

Which specifications should you check?

1. UV400 and lens category

According to the product description, UV400 means that the lens should block ultraviolet light up to 400 nanometres. For the Beneunder models, the manufacturer states UV blocking of at least 99.8 or 99.9 per cent. This is a product specification provided by the brand, so always check the latest information and any markings on the product when buying.

Also consider the lens colour and light transmission. A dark lens is not automatically better at providing protection. For everyday use in the Netherlands, a neutral grey, brown or green lens may be comfortable. If you drive frequently, you may also want to consider polarised sunglasses, as their product features may help reduce distracting glare from wet roads or water. However, check that the chosen lens is suitable for your driving conditions.

2. Fit and dimensions

The numbers on a frame usually indicate the lens width, bridge width and temple length in millimetres. For example, Ray-Ban Meta Wayfarer models are listed with sizes such as 50-22 or 53-22. The first figure is the lens width and the second is the bridge width.

Use these practical checks when comparing models:

  1. Measure a pair of sunglasses that fits you comfortably.
  2. Compare the lens width and bridge width with the new model.
  3. Check that the temples do not press against your temples.
  4. Make sure the frame does not unnecessarily cover your eyebrows or cheeks.

Cat-eye sunglasses often have raised outer corners and a distinctive shape. Boston sunglasses usually have a rounder, softer line. Oversized sunglasses cover more of the face, but require extra attention to the overall frame width.

3. Material, weight and portability

TR90 is a lightweight, flexible plastic material used in several Beneunder frames. According to the product description, the FD315 models feature soft temple supports and air-cushion nose pads. The FD421 models weigh 26 grams according to the specifications and fold down to approximately 35 millimetres thick.

Foldable sunglasses are handy in a jacket pocket, handbag or rucksack, but check that the hinge feels sturdy and only fold the glasses in the intended way. Lightweight sunglasses do not automatically prevent pressure points: the nose bridge, temple length and frame width all work together to determine comfort.

Recommended models by user profile

Suitable for: Budget-conscious beginners
Beneunder FD315-CN303 cat-eye foldable sunglasses

Beneunder FD315-CN303 Cat-Eye Foldable Sunglasses

Why it suits this profile: A compact choice for everyday use, commuting and travelling. The cat-eye shape adds style without requiring you to choose a large oversized frame.

How this product avoids the pitfall

The product description mentions UV400, an OAR anti-reflective coating and specific frame dimensions. This means you can look beyond the colour or shape alone.

Key benefit & advantages

TR90 frame, foldable design, air-cushion nose pads and a frame width of 5.8 inches according to the product specification.

Suitable for: Shoppers seeking premium quality
Beneunder Boston-style foldable sunglasses

Beneunder Boston-Style Folding Sunglasses FD01h

Why it suits this profile: Ideal if you are looking for classic Boston sunglasses with adjustable features and lens coatings.

How this product avoids the pitfall

The product description lists three temple positions and adjustable nose supports. This helps prevent a fit that is too loose or too tight.

Key benefit & advantages

UV400 nylon lenses, OAR anti-reflective coating, oleophobic coating and scratch-resistant coating according to the product information.

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

Ray-Ban Meta Wayfarer Gen1 AI Smart Glasses

Why it suits this profile: For tech enthusiasts and content creators who want to combine AI glasses, a camera, open-ear audio and hands-free controls with a Wayfarer frame.

How this product avoids the pitfall

The choice is not just about appearance: the required Meta AI app, iOS 14.4 or Android 10 and Bluetooth 5.2 are listed in the product information.

Key benefit & advantages

12 MP camera, five microphones, open-ear speakers, Wi-Fi 6 and up to four hours of battery life per charge according to the product description.

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

Are UV400 sunglasses suitable for everyday use?

UV400 sunglasses are designed to block ultraviolet light up to 400 nanometres. Always check the specific product information and any lens markings. Lens colour alone does not provide a reliable indication of UV protection.

Are polarised sunglasses better for driving?

Polarisation can reduce reflections from wet tarmac or water, for example, depending on the lens and conditions. Check that the lens is suitable for driving and be aware of possible limitations when viewing digital screens or certain displays.

How long do sunglasses last?

Their lifespan depends on the hinges, coatings, use and maintenance. Keep your sunglasses in a case, clean the lenses with a soft microfibre cloth and avoid placing them lens-side down. With smart sunglasses, battery capacity, app support and software compatibility also play a role.