UPF 50+ Sun Protection: Why Does Your Full Coverage Swimsuit Need to Be Certified?
When we talk about sun protection, most people think of sunscreen and its SPF rating. But what about the protection offered by our swimwear? The answer is much more nuanced than we think, and certification UPF 50+ represents an essential guarantee that too few consumers are aware of.
What is UPF protection?
LUPF (Ultraviolet Protection Factor) is an indicator that measures a fabric’s ability to block the sun’s ultraviolet rays. Unlike SPF, which applies to sunscreens, UPF measures protection against the entire UV spectrum — both UVA and UVB.
Rating scale:
- UPF 15-24: Minimal protection — blocks 93 to 95% of UV rays
- UPF 25-39: Good protection — blocks 96 to 97% of UV rays
- UPF 40-50: Very good protection — blocks 97 to 98% of UV rays
- UPF 50+: Maximum protection — blocks over 98% of UV rays
UPF vs SPF: what’s the difference?
THE SPF It measures protection against UVB rays only and applies to topical products.UPF UPF measures protection against the entire UV spectrum (UVA + UVB) and applies to textiles. Unlike sunscreen, which can wash off, a UPF rating is intrinsic to the fabric.
Why ordinary fabric is not enough
A white cotton t-shirt typically offers UPF protection between 5 and 10—that’s only 80 to 90% protection. When wet, this same t-shirt can have its protection reduced by half. A non-certified swimsuit can expose you to more UV rays than you might think.
UV rays and their effects on the skin
The rays UVB are responsible for sunburn and are the main cause of melanomas. UVA They penetrate deeper into the skin and are responsible for premature skin aging. They are present all year round, even on cloudy days, and pass through windows.
A fabric certified UPF 50+ effectively blocks both types of radiation.
Who should specifically wear UPF 50+ clothing?
- People with fair skin (phototypes I and II)
- The children : more sensitive skin, risks accumulated over a lifetime
- Immunocompromised individuals or under photosensitizing treatments
- Outdoor water sports enthusiasts
- People with photodermatosis (sun allergy)
- Pregnant women Pregnancy increases sun sensitivity
How to maintain UPF certification over time?
The UPF 50+ certification is maintained with proper care: max wash 30°C, no tumble dryer, dry in the shade, mild detergent without oxidizing agents, systematic rinsing after each use in swimming pool or sea.
Testimonials
⭐⭐⭐⭐⭐ Claire R., Cannes
“I have severe photodermatosis and the sun on the French Riviera is formidable. The Bahr-Bikini UPF 50+ has changed my summer life — I can finally enjoy the beach without ending up covered in red patches.”
⭐⭐⭐⭐⭐ Isabelle M., Montpellier
“Following medical treatment, my dermatologist advised me to cover my skin. The Bahr-Bikini is perfect — and my dermatologist was impressed by the UPF 50+ certification.”
Frequently Asked Questions
Is sunscreen still necessary with UPF 50+ clothing?
Yes, for uncovered body parts (face, hands, feet). UPF 50+ clothing replaces sunscreen only on the areas it covers.
Does wet clothing lose its UPF protection?
A garment certified UPF 50+ retains its protection even when wet — this is precisely what laboratories test during certification.
