SPF, PA, PPD, UVA, Stars...What does it all mean? Sun Protection Factor (SPF) The SPF number is a ratio of how much UV exposure your skin can be exposed
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Understanding Sun Protection Labels - KindofStephen

SPF, PA, PPD, UVA, Stars...What does it all mean? Sun Protection Factor (SPF) The SPF number is a ratio of how much UV exposure your skin can be exposed

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