The sun does more than just warm the skin; it tells its story.
Under its light, color slowly settles, sometimes gracefully, sometimes excessively. Tanning has always fascinated—a symbol of summer, carefree spirit, of vibrant skin.
But in recent years, a question has arisen: can we still tan while truly protecting ourselves?
And what if our clothes, so close to us, were the first elegant answer to this dilemma?
Light and skin: an ongoing dialogue
Tanning is nothing more than a defense mechanism.
Under the effect of ultraviolet rays, the skin produces more melanin: a pigment that absorbs some of this light to limit damage.
There are two main families of UV rays:
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UVB, shorter and more energetic, responsible for sunburn;
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UVA, longer, which penetrate to the dermis and accelerate skin aging.
According to the World Health Organization (WHO), approximately 95% of the ultraviolet rays that reach the Earth's surface are UVA.
Invisible, painless, they pass through clouds, windows... and sometimes clothes.
This is where it all comes into play: not all fabrics filter light in the same way.
Not all clothes protect in the same way
A light cotton t-shirt lets through almost a fifth of UV rays.
In other words, skin covered by ordinary fabric continues to tan — and therefore to suffer sun damage.
The tan that appears under these clothes is often uneven, lighter, sometimes imperceptible, but it is indeed the result of real exposure.
UV protective clothing, however, is of a different nature.
Their effectiveness is measured by an index called UPF (Ultraviolet Protection Factor), which indicates the proportion of rays blocked by the fabric.
A UPF 5 lets through 20% of rays,
a UPF 25 blocks about 96%,
and a UPF 50+ blocks more than 98%.
These protection levels are determined according to European standard EN 13758-1, which defines the test method: the fabric is exposed to a light source reproducing the solar spectrum, then measured before and after contact with water, salt, or chlorine.
Each result indicates the actual ability of the textile to filter UVA and UVB rays, regardless of its color or density.
Tanning with UV protective clothing: possible, but different
The answer is yes, but very lightly.
A UPF 50+ garment blocks almost all UV rays: visible tanning is therefore minimal, almost imperceptible.
Some photons can pass through, but in quantities too small to trigger true pigmentation.
It is a slow, diffuse tan, without burns or spots, sometimes barely warmer than the day before.
According to a joint study by the CNRS and the Skin Cancer Foundation, the difference in UV dose between bare skin and UPF 50+ fabric is equivalent to an exposure divided by fifty.
In other words: the time needed to obtain visible coloration would be fifty times longer.
The beauty of preserved skin
Tanning is not inherently dangerous. It is excess that is.
The modern idea of sun protection is no longer to avoid the sun, but to encounter it differently: through measured actions, chosen exposures, and clothing designed to accompany the light.
The fabric becomes an intelligent filter—it does not cut the connection with the sun, it softens its intensity.
Dermatologists also recommend prioritizing textile protection: unlike sunscreen, a garment does not evaporate, does not lose its effectiveness over time, and does not impact corals or skin.
It is a stable, aesthetic, and respectful barrier.
Tips for balanced exposure
To enjoy the sun without excess, simply change your intention:
expose yourself for less time, but better.
Wear light, covering, breathable clothing.
Choose soft colors to reflect light.
And, when the skin is bare, supplement with appropriate sunscreen, reapplied every two hours.
The tan built in this way is not an escape into color, but a natural reflection of light.
It lasts longer, and above all, it does not harm.
At Jayne
At Jayne, we believe that light should be tamed, not endured.
Our UPF 50+ certified clothing, designed and manufactured in Paris, embodies this alliance between elegance, protection, and lightness.
Technical voile shirts, flowing dresses, sculpting swimsuits: each piece is designed to accompany the sun, not to flee it.
Because the true beauty of tanned skin lies in its health, its softness, and the care it receives.
Sources
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World Health Organization (WHO) — Solar Ultraviolet Radiation: Global Burden of Disease, 2021
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CNRS — Studies on UV transmission according to textile density, 2019
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Skin Cancer Foundation — Understanding UPF Clothing and UV Exposure, 2022
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European Standard EN 13758-1:2001 — Textiles – Solar ultraviolet protective properties – Method of test for apparel fabrics and marking
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French Agency for Food, Environmental and Occupational Health & Safety (ANSES) — Recommendations for reasoned sun exposure, 2020
