FAQs
SPF only measures protection against UVB, under standardized conditions. However, in real-world use, performance also depends on: protection against UVA, the stability of the formula, and resistance to water and friction. 👉 An SPF50 protection can quickly lose effectiveness if it is not designed to withstand real-world conditions.
What is the difference between theoretical protection and actual protection?
Why doesn't SeventyOne position its products as “universal”?
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