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SPF vs PA rating explained: SPF rates UVB (burning) protection, PA rates UVA (aging). What each number blocks, why broad spectrum matters, and how to read a bottle.
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1 guides · facts & specs only
1 guides · facts & specs only
SPF vs PA rating explained: SPF rates UVB (burning) protection, PA rates UVA (aging). What each number blocks, why broad spectrum matters, and how to read a bottle.
Read guide →