Comment by hollerith
1 day 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.
1 day 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.
Correction: UVB, not UVA.
Correction: the standard used for clothing is UPF, not SPF. They're similar, but there are differences.