What Is UV 400 Protection on Sunglasses

The UV400 protection label appears in almost every specification for quality sunglasses, yet it still raises questions. Here is a straightforward guide to what it means, how it affects your eyesight and how to choose your next pair without falling for common myths.

What UV400 protection means in sunglasses

UV400 protection indicates that the lens blocks between 99 and 100% of ultraviolet radiation at wavelengths up to 400 nanometres. It covers both UVA and UVB rays, meaning the entire UV light spectrum relevant to eye health.

In practical terms, glasses with UV400 protection act as a filter that stops harmful radiation before it reaches the eye’s natural lens and retina. This has nothing to do with how dark the lenses are, but rather with the treatment and material of the lenses themselves.

In the European Union, the UV400 label is usually accompanied by the CE mark, which certifies that the product meets minimum safety standards. If you cannot find a CE mark or a clear reference to UV protection, be cautious, however attractive the glasses may look.

The difference between UV400 and other protection levels

Any lens that blocks at least 99% of UV radiation up to 400 nm can be labelled UV400. Below that level, the lens may filter out some UV radiation, but it does not provide the level of protection considered safe for prolonged outdoor use. The risk of wearing glasses without UV400 protection is that dark lenses cause your pupils to dilate. Less visible light enters, but if UV radiation is not blocked, that extra UV can penetrate the eye more easily.

Why UV400 protection is essential for your eyes

Your skin has sunscreen; well-protected eyes have lenses with UV400 protection. Unfiltered ultraviolet radiation increases the risk of cataracts, macular degeneration and other conditions that develop over time rather than overnight.

As well as the eye itself, radiation affects the skin around it, one of the thinnest and most sensitive areas of the body. That familiar burning sensation around your eyes at the beach or in the mountains is a physical sign that protection has come too late.

If you spend long hours outdoors, exercise in the city or move between roads, water and reflective surfaces, wearing glasses without UV400 protection is more than uncomfortable; it exposes your eyes to a dose of radiation you could avoid by choosing the right lenses.

High-risk situations without UV400 protection

There are situations where a UV400 filter is essential: - Beaches and water sports: the water’s surface reflects a large proportion of UV radiation. - High mountains and snow: the combination of altitude and snow dramatically increases both direct and reflected radiation. - Cities in summer: tarmac, glass and metal increase reflections and glare. - Outdoor endurance sports: running, cycling, trail running and skiing involve hours of continuous exposure to full sunlight. In all these situations, dark lenses without UV400 protection are worse than wearing no glasses at all.

UV400 protection and polarised sunglasses are not the same

A common misconception is that polarised sunglasses offer greater protection against UV radiation. Polarisation and UV400 protection are two separate features that may or may not come together, depending on the quality of the product.

UV400 protection focuses on blocking ultraviolet radiation. Polarisation acts on reflected visible light, eliminating much of the horizontally reflected glare that causes eye strain, particularly on water, roads and snow.

The ideal sunglasses for intensive use combine both: UV400 protection to protect your eyes and polarisation to improve visual comfort and contrast. But do not assume a pair of glasses is safe simply because “polarised” appears prominently on the label.

How UV400 and polarisation work together in glasses

A technically comprehensive pair of glasses can be described as follows: - Lenses with UV400 protection: block UVA and UVB radiation up to 400 nm. - Polarising filter: reduces glare and improves contrast and clarity. - Additional treatments: an outer mirror coating, photochromic technology or a blue light filter for specific uses. In sports collections such as the athletic eyewear ranges for running, cycling and water sports, this combination makes the difference between a fashion accessory and a genuine tool for performance and protection. Within the urban range, models from collections such as roller may incorporate similar technology in a more lifestyle-oriented design.

UV400 protection and visible light filters

The term UV400 protection does not describe how dark a lens is or how much visible light it lets through. That is what light filter categories are for, usually ranging from 0 to 4.

Each category indicates the percentage of visible light that passes through the lens, but it does not describe how much UV radiation the lens blocks. A very lightly tinted lens can provide full UV400 protection; a very dark, inexpensive lens may offer none.

Light filter categories and their relationship with UV400

The standard classification of visible light filters can be summarised as follows: - Category 0: an almost transparent lens that lets through between 80 and 100% of light. - Category 1: a lightly tinted lens that filters out a small amount of light, suitable for cloudy days. - Category 2: a medium-tinted lens for moderate light conditions. - Category 3: a dark lens that lets through only 8 to 18% of light. This is the most common category for general outdoor use. - Category 4: a very dark lens for extreme conditions, such as high mountains or deserts; unsuitable for driving. In all these categories, you can find lenses with or without UV400 protection. What protects you from ultraviolet radiation is the UV treatment, not the darkness of the tint.

How lens colour affects UV400 protection

Lens colour affects your perception of light and how you see colours, but it does not determine UV400 protection on its own. You can have a light brown lens with full protection and a black lens without any reliable UV filter.

Certain tints change how you perceive your surroundings. For example, brown and amber tend to improve contrast, while grey generally preserves natural colours more accurately. When driving or playing sports, this matters just as much as comfort.

For everyday use, focus on two questions: does the lens clearly specify UV400 protection, with a CE mark and technical specifications? And does its colour allow safe colour perception for your activity, particularly when driving or taking part in technically demanding sports?

Common colours and recommended uses

Leaving colour marketing aside, there are some widely accepted patterns: - Grey: a balanced option for everyday use, with high colour accuracy. - Brown or amber: enhances contrast, useful for driving and outdoor sports. - Green: also offers a good balance between contrast and colour accuracy. - Unusual fashion tints without technical specifications: use them only if the product specifications confirm UV400 protection and an appropriate filter category. In urban collections such as sunglasses or lightweight ranges such as ultra light, the challenge is to combine fashionable colours and finishes with clear technical specifications that guarantee UV400 protection.

How to check whether glasses provide genuine UV400 protection

Beyond the label, there are objective signs that help you determine whether a pair of glasses’ UV400 protection is more than a marketing claim. You do not need a laboratory at home, but you do need to make an informed choice when buying.

The first clue is where the glasses come from and how they are sold. Glasses bought from unregulated retailers, beach stalls or marketplaces without technical information generally involve more uncertainty than a brand that publishes clear specifications covering materials, lens type and protection level.

The second clue is the documentation supplied with the product: the manual, hang tag or online specifications. These should include both the CE mark and an explicit reference to UV400 protection or the relevant European standard.

What to check before adding to your basket

Check at least the following points: - A visible CE mark on the frame or in the documentation. - An explicit reference to UV400 protection or blocking 99–100% of UVA and UVB radiation. - Information about the light filter category (0–4), appropriate for your intended use. - A consistent description of the lens type: standard, polarised, mirrored, photochromic or a combination. In well-organised catalogues, browsing complete listings such as all or specific collections such as 9xx helps you compare technical specifications instead of relying solely on the photograph.

UV400 protection in sports and technical eyewear

In running glasses, cycling glasses, ski goggles or water sports eyewear, UV400 protection is the starting point. The remaining features build on that foundation: polarisation, photochromic technology, panoramic lenses or ventilation.

During long sessions, the combination of radiation, wind and airborne particles increases stress on the eye’s surface. If the lenses do not block UV radiation properly, your eyes can become red, irritated and fatigued, with effects you notice at the end of the day as well as during your workout.

In snow or high mountains, wearing glasses without UV400 protection is a serious mistake. UV rays reach you directly and also reflect off the snow, producing an effect similar to sunburn, but on the eye and the surrounding skin.

Key features beyond UV400 protection

When choosing sports glasses with UV400 protection, you should also consider: - Lens type: polarised to reduce glare on roads or water; photochromic if you train in rapidly changing light conditions. - Coverage: wraparound designs that provide good protection at the sides to keep out light and wind. - Fit: temples and a bridge that keep the glasses secure without pressure points or bouncing as you move. - Weight: lightweight materials, particularly for long or high-intensity sessions. Proprietary lens technology, combined with UV400 protection and sport-specific designs, makes the difference between glasses that look good and glasses that stay comfortable throughout demanding training sessions.

Key takeaways about UV400 protection

UV400 protection means blocking almost all ultraviolet radiation up to 400 nm, including both UVA and UVB. It does not depend on lens colour or how dark the lenses appear.

The visible light filter level (categories 0 to 4) determines how much light enters your eyes, but it does not replace UV400 protection. The two specifications complement each other; neither cancels out the other.

Polarisation, lens colour and mirror finishes affect visual comfort and appearance, but they do not guarantee adequate protection on their own unless the UV400 filter is clearly specified.

Whenever you buy sunglasses, whether for everyday wear or sports, the logical order is simple: first, verified UV400 protection; next, a filter category suited to your intended use; and only then shape, colour and style.

UV400 protection is more than a minor technical detail: it is the minimum standard for treating your eyes with the same care you give your skin in the sun. Choosing glasses with clear, documented protection lets you enjoy the outdoors freely without turning every sunny outing into a long-term gamble with your eyesight.

When to Replace Your Sunglasses

How often should you replace your sunglasses? If you wear your sunglasses outdoors every day, two to three years is a reasonable guideline. This is not because the UV filter automatically “expires”, but because noticeable wear on the lenses and frame tends to develop over that period. Intensive sports use (running, cycling, mountain activities, sea sports) puts them under greater strain. In this setting, replacing them every one or two years makes sense if you want to maintain the same optical quality and protection. If you only wear your glasses occasionally and store them safely, they can last longer. The key is the condition of the lenses and frame and how they perform in bright light, rather than the calendar. Below, you will find clear signs that it is time for a replacement. Why a two-year guideline is often recommended After around two years of frequent use, three factors tend to come together: - Accumulated micro-scratches on the surface, even when the lenses look “fine” to the naked eye. - Rough cleaning with T-shirts, beach towels or paper that wears away surface treatments. - Continuous exposure to UV radiation, heat, sweat and chemicals such as sunscreen and sea salt, which can alter coatings and tints. This rarely causes the UV filter to disappear suddenly, but it does reduce visual quality, increase unwanted reflections and may partially reduce lens performance. This is the real reason behind the recommendation to replace sunglasses periodically. Clear signs that you need to replace your sunglasses Rather than counting the years, look for these signs. If you notice one or more, it is time to consider a replacement. Visible scratches or a dull surface: If you see scratches, small cloudy spots or hazy areas, the lens is scattering more light than it should. You may notice halos around lights, a misty view or discomfort on very bright days. Yellowed or cloudy lenses: The original tint becomes uneven, a yellowish or dirty grey tone appears, and your vision is no longer neutral. This is a sign that the material or coatings are ageing. Distortion or loss of clarity: Images appear slightly distorted or blurry, or your eyes become tired sooner than they used to. If the difference is obvious when compared with a new pair, stop straining your eyes. New internal reflections: You notice more glare and reflections inside the lens, especially when sunlight comes from the side or behind you. Anti-reflective or mirror coatings may have deteriorated. A damaged or poorly fitting frame: Loose temples, worn hinges, a misshapen bridge or brittle components. Even if the UV filter still works, an unstable frame compromises fit and effective protection, especially during sports. Additional signs in polarised and photochromic glasses - Polarised lenses that no longer reduce glare as effectively: if you still see intense reflections on water, snow or wet roads that used to be noticeably reduced, the polarising filter may have deteriorated. - Photochromic lenses that respond more slowly: if they take much longer to darken or clear, or stay permanently at an intermediate tint, the photochromic material has aged. In both cases, replacement is about more than comfort. It affects safety when driving, running or cycling in changing light conditions. When to replace sunglasses for safety In some situations, you should not extend their useful life simply because you like their appearance or feel attached to the model. Eye safety matters here, as does physical safety when playing sports. After a heavy impact: Dropping them from a height, stepping on them or subjecting them to a hard knock can create micro-cracks in the lenses or frame that are invisible to the naked eye. If you notice creaking, new looseness or whitish areas in the material, replacement is the better option. If you drive frequently: Anyone who spends hours behind the wheel should be particularly strict. Scratched or distorted lenses and uneven polarisation can mean slower reactions and greater eye strain on long journeys. Intensive use in snow, on water or at high altitude: UV radiation and brightness increase sharply around snow and water. Worn glasses are a significant concern here: they increase the short-term risk of photokeratitis and the long-term risk of cumulative damage. If your prescription or vision has changed: If you notice changes in your eyesight, even when your sunglasses have non-prescription lenses, have your vision checked by an optometrist. There is little point in holding on to glasses that no longer support your eye health. The relationship between UV protection and lens condition UV filters generally remain stable over time in quality lenses. The problem is that scratches, embedded dirt and damaged coatings alter how light enters the eye and, to some extent, how that protection performs. Do not wait until the glasses are unusable; replace them when they begin to reduce your comfort and confidence. When replacing sunglasses makes sense for comfort or style Beyond safety, there are times when changing your glasses makes sense even if they still technically “work”. When they no longer fit your face properly: If they increasingly slide with sweat, spread too easily or pinch your temples or nose bridge, everyday wear becomes a constant struggle. Over time, a poor fit allows more light in at the sides and means you wear them less because they become uncomfortable. When your activities have changed: Perhaps you used to spend most of your time in the city and now run, cycle or spend more hours at the beach. In that case, keeping a casual pair and adding a sports model with better grip and ventilation makes sense, rather than pushing a design beyond the activities it was made for. When your style has evolved: If your clothes, hairstyle or even your job no longer suit a distinctive pair from years ago, changing models helps align your appearance with who you are today. The aim is to stay true to your own style rather than chase every trend. Rotate your glasses to share the wear Having two or three well-chosen pairs extends the life of each. You can alternate between an everyday urban model, a more technical pair for training and a bolder option for weekends. Each pair gets less wear, and you have more freedom to express your identity. How to make your sunglasses last longer If you look after your glasses properly, you will not need to obsess over their age. The key is reducing avoidable wear. Clean them correctly: Use lukewarm water and mild soap, then dry them with a microfibre cloth. Avoid paper, hand towels and T-shirts, which can scratch. Do not use alcohol or harsh cleaners unless the manufacturer permits them. Use a case whenever you are not wearing them: Store them in a hard or semi-rigid case. Leaving them face down on a table or on a car dashboard is a quick way to accumulate micro-scratches and heat damage. Avoid extreme heat: A closed car in the sun, radiators, saunas or leaving your glasses on sand in direct sunlight. Heat softens frames, warps lenses and can cause mirror or anti-reflective coatings to peel away. Be careful with creams and sprays: Sunscreen, hairspray and household cleaning products can damage coatings. Put your glasses on after applying products, and avoid touching them with cream-covered hands. When repair is worthwhile If the frame is in perfect condition and only the lenses are damaged, some opticians can replace them with new lenses featuring modern UV protection and, if you wish, polarisation. This may be cost-effective for certain frames, although with many lifestyle brands, replacing the complete pair is simpler and more affordable. Specific signs for each lens type Not all lenses age in the same way. Depending on the type you wear, different signs indicate that it is time for a replacement. Mirrored lenses: When the mirror coating begins to peel, less reflective areas or small spots revealing the underlying lens colour appear. Beyond the appearance, different areas begin to handle light differently. It is time to replace them. Polarised lenses: If you start seeing uneven blotches, coloured patches or unusual reflections on screens, the filter may be delaminating. Another warning sign is a clear decline in visual comfort when driving or around water compared with when the glasses were new. Photochromic lenses: They have reached the end of their useful life when they no longer become as dark as they did when new or take too long to respond. If you still squint while wearing them in bright sunlight, it is time for a new pair. Screen or blue light lenses: Indoors, distracting reflections, early eye fatigue or an excessive change in the appearance of whites can indicate deteriorating coatings, even if the lens looks clean. Replacement is usually more about comfort than UV safety here, but it is still worthwhile. When to replace sports sunglasses sooner For running, cycling or mountain glasses, add one more criterion: stability. If every footfall, jump or vibration makes your glasses move too much, the fit has deteriorated and earlier replacement is preferable. Glasses that bounce around on a cycling or trail descent are a significant concern. Why you should replace them before they are ruined Delaying the replacement of sunglasses can affect other areas: eye health, performance and everyday comfort. More eye strain and headaches: Scratches, internal reflections and distortion make your eyes work harder. You notice this as dry eyes, a gritty feeling at the end of the day or a need to squint more than usual. Less protection when you need it most: In extreme light conditions such as beaches, snow, water or cities with highly reflective roads, any deterioration is amplified. These are precisely the situations where you want reliable performance from your glasses. A worse sporting experience: Lenses that fog up more or scratch easily, or a frame that slips during training, undermine your experience. Eventually, you stop wearing them or train uncomfortably, even though they are part of your equipment. How your brand choices and personal style come across: Continuing to wear glasses that no longer look or feel clear does not suit a carefully considered appearance. Just as you replace trainers when they are worn out, your glasses also say something about how you move through the city. A practical rule for deciding when to replace them If you are unsure, try two simple checks: compare your glasses with a new quality pair while looking at the same brightly lit scene, and ask someone you trust to try yours and describe what they see. If you both agree that vision is worse, reflections are distracting or the lenses look tired, do not wait any longer. How to choose your next pair of sunglasses When replacement time comes, you can use the opportunity to choose lenses and frames that better suit how you live now. Consider your main activity first: City wear, the beach, training or driving? For versatile urban use, combine design and comfort. If sports are your priority, look for grip, low weight and specialised lenses, choosing polarised or photochromic options for your environment. A good fit for your face: A comfortable bridge, temples that hold securely without pinching, and good side coverage to keep out stray light. Try them while moving, as well as standing still in front of a mirror. Lenses suited to your surroundings: Polarised lenses for water and shiny roads, photochromic lenses if you constantly move between shade and sun, and mirrored lenses if you spend time in very bright surroundings and want further glare reduction. Always choose UV protection that complies with the applicable standards. Rotate thoughtfully: Consider an everyday pair and another that is more technical or expressive. Sharing the wear gives you more versatility and postpones the point at which replacement becomes essential. Explore models for your next replacement If your current glasses are clearly ready for retirement, this is a good time to explore collections with light, versatile frames. For urban designs with attitude, browse sunglasses or the roller collection for a more retro feel. If all-day comfort is your priority, frames from the ultra light range are suited to prolonged wear

Sunglass Frame Materials

The frame material determines weight, comfort, durability, resistance to sweat and impacts, and even how your sunglasses look over time. In lifestyle sunglasses such as those from D.Franklin, it also defines the character of each collection and how it fits into your daily life. Choosing the right material means you can wear your glasses comfortably for hours, prevent warping and get more from lens technologies such as OPTAREX™, photochromic lenses and polarisation. Choose poorly, and your glasses end up in a drawer or, worse, on the floor as soon as the temples lose their shape. Two main material families In practice, almost all frames on the market fall into two main families: metal and plastic. Each includes very different compositions and properties, from ultralight titanium to nylon blends designed for sports. Understanding these differences helps you decide which type best suits your actual needs, whether for everyday city wear or demanding athletic use. Metal frames: benefits and types Metal frames offer slimmer profiles, a clean look and a very precise fit. They are common in aviator sunglasses, geometric designs and minimalist urban styles. Technically, they stand out for their strength and their ability to support very slender bridges and temples without losing stability. Titanium Titanium is the benchmark when you want minimal weight and high strength. It resists deformation, stands up very well to daily use and is usually hypoallergenic, making it a good option if your skin reacts to other metals. It is useful for glasses worn for many hours at a time, such as frames for both everyday wear and work with a blue light filter. Aluminium Aluminium combines lightness and rigidity. It allows slim, stable frames and takes surface treatments and coloured finishes well, from understated matt shades to brighter tones. It is often used in contemporary designs where visible metal is desirable without excessive weight. Stainless steel Stainless steel is strong, resists corrosion from sweat and is easy to shape for a good temple fit. It is a very stable material, ideal if you do not want to worry about your glasses losing their shape over time. It weighs slightly more than titanium but remains comfortable in slim frame designs. Plastic frames: benefits and types Plastic frames dominate urban sunglasses for one simple reason: visual impact. They allow playful colours, bold volumes and chunky or retro designs that would be impractical in metal. From a technical perspective, the key is the type of polymer and how the frame is manufactured. In ranges such as D.Franklin’s sunglasses collections, most urban models use high-quality plastics precisely for this combination of lightness, colour and strength. Cellulose acetate Cellulose acetate is the classic choice for plastic frames. It adjusts well, withstands daily use and offers countless colours, patterns and translucent effects. It is ideal for retro-inspired frames, bold square sunglasses or striking cat-eye designs. When properly polished, it has a smooth feel and a distinctive shine. Cellulose propionate Propionate is an acetate derivative that is lighter and highly resistant to prolonged contact with skin, sweat and cosmetics. It is a good option if you tend to wear glasses all day and worry about wear around your nose and ears. Its weight-to-volume ratio makes it suitable for slightly thicker frames without making them feel heavy. Shape-memory resins Shape-memory resins, such as certain epoxy variants, are characterised by thermal stability and the ability to return to their original shape after controlled heating. In eyewear, they are used to create very light frames that withstand minor stresses without deforming. They are useful for models that need a precise fit without sacrificing volume or colour. Nylon blends Blends of nylon and other polymers produce particularly flexible, lightweight and impact-resistant frames. Injection moulding allows wraparound sports designs with more pronounced curves. This makes them common in glasses for running, cycling and snow sports, where the material must withstand twisting and falls without breaking. In a range such as D.Franklin’s athletic collection, these plastics make good sense for high-performance models. How to choose the material for your needs Beyond the technical specifications, the ideal material is one that withstands your real life without getting in the way. Choose according to how you use your glasses, as well as how they look in the mirror. Everyday city wear If you wear sunglasses around the city every day, you want manageable weight and a distinctive appearance. Acetate and propionate frames work very well here because they let you experiment with round, square or cat-eye shapes without sacrificing comfort. Urban collections such as roller offer examples of these materials supporting a relaxed retro design. Sports use For running, cycling or snow sports, the material needs to be light, flexible and impact-resistant. Nylon blends and other injection-moulded plastics are the first choice, followed by certain lightweight metals if you prefer a more hybrid look. Sports glasses combine these frame types with polarised or photochromic lenses for complete technical performance. Sensitive skin or allergies If you have reacted to metal frames, consider titanium or certain high-quality steels. For plastic frames, choose well-finished acetates without rough edges or metal parts in direct contact with your skin. Avoid poor-quality finishes that may flake around the bridge or temples. Glasses for all-day wear When you wear glasses for many hours at a time, weight is crucial. Slim titanium or steel frames and certain shape-memory plastics work better than very thick acetate. Another option is to look for ranges designed for low weight, often grouped into dedicated collections such as ultra light, where the design focuses on reducing weight while retaining character. The relationship between frame material and lens technology The frame and lenses need to work together. Shape and material influence which lens types make sense and the situations the complete pair is genuinely suited to. Lifestyle sunglasses with OPTAREX lenses Acetate or slim metal frames work well with urban sunglasses featuring OPTAREX™ Core or Mirror lenses. They provide sufficient lens stability, allow striking designs and distribute weight comfortably across the nose and ears. If minimal weight is your priority, models in shape-memory plastics or lightweight metals naturally complement technologies such as OPTAREX™ Ultralight. Polarised or photochromic sports glasses In running, cycling or skiing glasses with polarised or photochromic lenses, the frame material needs to match the lenses’ technical performance. Nylon blends and injection moulding allow wraparound shapes that offer better protection from wind and splashes while handling the tension of curved lenses without deforming. This helps keep your field of vision clear and stable, even during sudden temperature changes. Quick tips before choosing a material 1. If you are choosing between several frames, compare their actual weight in your hand, rather than relying solely on specifications. A ten-gram difference becomes noticeable after several hours of wear. 2. Look at the finish on the edges and hinges. Poorly polished high-quality acetate performs worse than a simpler plastic that has been properly finished. 3. Think about how you store your glasses. If they sit loose in a backpack or bag, prioritise slightly more flexible materials or designs that protect the lenses well. 4. If you want one versatile pair, sacrificing some dramatic frame thickness for better everyday comfort is usually worthwhile.

Which Sunglass Lens Color Is Best for You?

What sunglass lens colour to choose depending on your use and style Choosing a pair of sunglasses is not just about the frame. The colour of the lens is a key factor in finding the perfect sunglasses. The colour of the lens directly influences how you perceive your surroundings, your visual comfort and everyday use, as well as having an impact on the overall aesthetic. This detail, which often goes unnoticed, is what makes the difference between a pair of sunglasses that simply look good and a pair that really works. Each lens colour has a specific purpose. Filters are applied to offer a better visual experience in specific light conditions. Having different types of sunglasses depending on the activity can be the key. Understanding which sunglass lens colour to choose for the most common conditions in your activity allows you to optimise both style and functionality. Why choosing the right lens colour is important The colour of the lens affects three key aspects that directly influence the visual experience: Perception of the real colours of your surroundings Level of contrast you perceive Glare reduction Grey lenses: natural vision and balance Grey lenses are one of the most versatile options, as they reduce light intensity without altering colours, providing a more natural vision. When to choose them They are ideal for everyday use, especially in bright light conditions, and work well in the city, at the beach and while driving. What they offer Colour accuracy Even light reduction High visual comfort Brown lenses: more contrast and depth Brown lenses increase contrast and improve depth perception, allowing you to see details more clearly. When to choose them They are suitable for outdoor activities, such as long walks or driving in changing light conditions. What they offer Improved contrast Greater sharpness in bright environments A warmer visual sensation Green lenses: balance between contrast and natural vision Green lenses offer a middle ground between grey and brown lenses, maintaining good colour perception while slightly improving contrast. When to choose them They work well for prolonged outdoor use, combining comfort and definition. What they offer Good visual balance Glare reduction Versatility in different environments Blue lenses: style with moderate functionality Blue lenses stand out mainly for their aesthetics, adding a bolder and more modern look, although their functionality is more limited compared to other options. When to choose them They are an interesting option for urban use and outfits where design plays an important role. What they offer A distinctive image A cooler visual sensation Use more focused on style than performance Yellow lenses: greater visibility in low light Yellow lenses are designed to improve visibility in low-light conditions. They have recently become popular for driving, but they have a long history in the sports world. When to choose them They are useful on cloudy days, in fog or at dusk, both for driving and for sports that require precision and concentration. What they offer Increased contrast Better perception in darker environments Reduced eye fatigue in challenging conditions Mirrored lenses: glare control Mirrored lenses feature a reflective coating that reduces the amount of light entering the eye. When to choose them They are especially useful in environments with high sun exposure, such as the beach or the mountains, and are commonly used in sports sunglasses for cycling and skiing. What they offer Greater protection against intense reflected light Reduced glare A more striking aesthetic How to choose the lens colour according to your use To make the right decision, in addition to the points above, it is important to match the main use with the type of lens that works best in each case: Everyday city use: grey or green lenses for a balanced experience. Outdoor activities: brown lenses to improve contrast and depth. Driving: grey or brown lenses, depending on whether you prefer natural vision or greater definition. Style and fashion: blue or mirrored lenses for a more eye-catching look. Low light: yellow lenses to optimise visibility. Additional filters for choosing the perfect lenses Colour is important, but in addition to the light filter, a good pair of sunglasses should also offer: UV protection: make sure the sunglasses block 100% of UV rays. Lens quality: a good lens prevents distortion and improves the visual experience. Comfort: choose a model that fits your face well for prolonged use. Identifying the main use you will give them, the light conditions in which you usually wear them and your visual preferences in terms of sharpness is the key step to making the right choice. However, UV400 eye protection is the priority, while both style and comfort can be defined through the choice of frame.