Sun protection factor: What SPF 30, 50 & Co. really mean ☀️

Have you ever stood in front of the shelf wondering if SPF 30 is enough or if it should be SPF 50 instead? You are not alone! The Sun Protection Factor (SPF) is often confusing, but it’s actually not that complicated once you know what matters.

What the Sun Protection Factor really means

The Sun Protection Factor indicates how much longer you can stay in the sun without getting a sunburn.

Example:
If your skin turns red after 10 minutes without protection, SPF 30 theoretically extends this time to 300 minutes.
But: This is only a guideline; in practice, factors like sweat, water, friction, or applying too little cream play a major role.

SPF at a glance

💡 GOOD TO KNOW: The difference between SPF 30 and SPF 50 is smaller than many think: SPF 30 blocks about 97% of UV-B radiation, and SPF 50 about 98%. However, that 1% difference can be crucial if you don’t apply enough cream.

Which SPF suits which skin type?

• 🌸 Very fair skin types: SPF 50

• 🌞 Medium skin types: SPF 30–50

• 🌺 Darker skin types: SPF 15–30

• 👶 Children: Always SPF 50+, as children's skin is particularly sensitive.

Why you are probably using too little sunscreen

Most people use only a quarter of the recommended amount! For the entire body, you need about 6 teaspoons (35–40 ml)—that sounds like a lot, but it is necessary to truly achieve the stated SPF.

UV-A vs. UV-B – what protects against what?

• UV-B is responsible for sunburn.

• UV-A causes skin aging and cell damage.

When buying, look for the UVA seal (a circle with "UVA") or the term "broad-spectrum protection." Modern formulations, like those from V.SUN, reliably protect against both types of radiation.

Myth: Higher SPF lasts longer

False! A higher SPF does not mean you have to reapply less often.
Regardless of whether it's SPF 30 or 50, after two hours you should renew your protection, especially after swimming, sweating, or drying off.

By the way, "water-resistant" only means that the cream remains effective for 40–80 minutes in the water. After that: definitely reapply!

When SPF 30 is enough and when SPF 50 is better

✅ SPF 30 is enough for:

• Short walks or strolling through the city

• Cloudy skies (UV radiation still gets through!)

• Autumn and winter in Central Europe

☀️ SPF 50+ is better for:

• Beach vacations, hiking, or skiing

• Fair, sensitive skin

• Children and babies

• High altitudes or intense solar radiation

Applying sunscreen correctly – here is how

🧴 Amount: About 35–40 ml (6 teaspoons) for the whole body.
⏰ Timing: Apply 30 minutes before sunbathing.
✨ Don’t forget: Ears, neck, feet, back of the knees – the classics that are often forgotten.

Conclusion: The best SPF is the one you actually use 🌿

Whether SPF 30 or 50—the decisive factor is that you use your sun protection regularly and in sufficient quantity. This is the only way it can unfold its full effect.

When protection feels good, it becomes a habit. Learn more about conscious and sustainable sun protection in our other blog articles.