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It means only 2% of the harmful rays (UVA) are getting through the shirt or alternatively the skin under the shirt can spend 50 times as long in the sun as it c
by hollerith 4mo ago
It means only 2% of the harmful rays (UVA) are getting through the shirt or alternatively the skin under the shirt can spend 50 times as long in the sun as it could without any protection.
- hollerith 4mo agoCorrection: UVB, not UVA. Correction: the standard used for clothing is UPF, not SPF. They're similar, but there are differences.