At Ker Sun, we put our expertise to work for your skin. Specialists in sun protection for many years, we develop clothing that effectively protects you from the sun's UV rays, thanks to certified fabrics and no added chemical filters.

Our aim? To offer you reliable, long-lasting protection that is recognized by health professionals, so that you can enjoy the sun with complete peace of mind.

Find out here in detail what a UV T-shirt is, its technical characteristics, the standards and certifications that guarantee its effectiveness.

Femme souriante portant un t-shirt anti-UV bleu UPF 50+.

What is a UV t-shirt?

A UV T-shirt is a technical garment specially designed to offer maximum sun protection. Unlike a conventional T-shirt, which does not provide controlled filtration of ultraviolet rays, the fabric of a UV T-shirt is certified UPF 50+ in accordance with European standard EN 13758-1, guaranteeing a very high level of protection against harmful solar rays. This effectiveness is based on a meticulous choice of fibres, optimum weave density and a design that mechanically blocks UV rays, without resorting to the application of chemical filters.

At Ker Sun, our exacting standards for UV protection on our t-shirts are reflected in the rigorous tests carried out on each fabric and each colour, ensuring consistent protection, season after season. While a conventional T-shirt may let some UV rays through, our UV T-shirts offer a real and measurable barrier, actively helping to prevent the harmful effects of prolonged exposure to the sun, such as sunburn, premature skin ageing or the aggravation of certain skin conditions.

In short, a UV T-shirt differs from ordinary T-shirts in that it is expertly designed to effectively block the sun's harmful rays, mainly UVA and UVB, and guarantees maximum sun protection thanks to rigorous certification of the garment to standards.

Our women's selection

Vendor:Ker Sun

UV T-shirt - Saint-Malo

Women Everyday
$60.90
New
Vendor:Ker Sun

UV T-shirt - Boston

Women Sport
$62.90
Vendor:Ker Sun

UV T-shirt - Saint-Malo

Women Everyday
$54.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Women Swimming
$32.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Women Swimming
$32.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Women Swimming
$32.90
Vendor:Ker Sun

UV T-shirt - Saint-Malo

Women Everyday
$60.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Women Swimming
$39.90
See the UV t-shirts for women
Homme portant un t-shirt anti-UV manches courtes marinière, UPF 50+.

Is a lycra a UV protective t-shirt?

The confusion arises from the fact that the term « Lycra » primarily refers to a stretchy synthetic fiber (elastane), but is often mistakenly used to refer to a swim shirt as a whole. For example, when we talk about « Lycra » when thinking of a swim shirt, we are not referring to the actual function or properties of the garment, but simply to one of its textile components. This imprecision sometimes leads to a simple swim shirt containing Lycra being mistakenly compared to a shirt specially designed for UV protection.

A lycra is therefore not, by definition, a UV t-shirt. Although these garments, popular for their strength, elasticity and comfort during aquatic activities, can partially block the passage of ultraviolet rays through the fabric, they are not systematically designed or tested to guarantee optimal UV filtration.

Conversely, a UV t-shirt (bathing or not) is developed with a specific objective: to effectively block UVA and UVB rays. Its effectiveness is measured, controlled and certified according to strict standards (for example European standards EN 13758-1 and EN 13758-2), giving it a proven UPF 50+ protection level.

In short, it's important not to assume that a swimsuit T-shirt (or more commonly known as a « Lycra ») systematically offers UV protection. Only a certified UV T-shirt will provide you with a reliable barrier that meets the expectations of even the most sensitive skin.

Our Men's Selection

New
Vendor:Ker Sun

UV T-shirt - Boston

Men Sport
$62.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Men Swimming
$39.90
Vendor:Ker Sun

UV Zip-up T-shirt - Boston

Men Sport
$87.90
New
Vendor:Ker Sun

UV Zip-up T-shirt - Boston

Men Sport
$87.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Men Swimming
$39.90
-15%
Vendor:Ker Sun

BUNDLE - 2 x UV T-shirt - Saint-Malo (Nuage d'été/Macaron Glacé)

Men Everyday
Sale price$103.50Regular price $121.80
Vendor:Ker Sun

UV Swim shirt - Malibu

Men Swimming
$32.90
Vendor:Ker Sun

UV Swim shirt - Malibu

Men Swimming
$32.90
See the UV t-shirts for men

Frequently asked questions

Should I wear sunscreen under a UV-protective t-shirt?

With Ker Sun UV t-shirts, designed for maximum sun protection, there is no need to apply sunscreen to the covered areas.
However, for optimal protection, it is essential to apply sunscreen to areas not covered by clothing. We recommend applying sunscreen 30 minutes before sun exposure and reapplying every two hours or after swimming, as directed by the product used.

Does the fabric of a UV t-shirt provide UV protection even when wet?

If your UV t-shirt is designed for swimming, its fabric has been carefully selected because it offers very high sun protection certified UPF 50+ even in humid environments. This means that your skin remains protected, whether the garment is dry or after prolonged swimming.

What is the difference between Ker Sun UV clothing and classic ready-to-wear clothing?

Ker Sun UV clothing doesn't just dress you: it effectively protects you against the risks associated with the sun.

This is based on 3 pillars:

1. An exceptional level of sun protection: Our clothes are made from UPF 50+ certified fabrics. This protection, which is durable over time, offers a permanent barrier against UV rays, well beyond what is offered by classic ready-to-wear clothing.

2. Optimal coverage for enhanced protection: Each Ker Sun piece is intelligently designed to offer maximum protection for the areas most exposed to the sun (arms, neck, hands, face, legs, etc.), while combining elegance and ease of daily use.

3. Comfortable even in hot weather: Designed for warmth, our breathable, lightweight fabrics, combined with airflow-friendly cuts, keep you cool while being protected.

Classic ready-to-wear clothing, not designed to protect from the sun, systematically lacks these assets. At Ker Sun, we put at the heart of our mission the creation of clothing that really protects from the sun, so that everyone can enjoy sunny days with complete peace of mind.