Last Updated
：2025/11/20
sun protection factor
（ plural ）
（ abbreviation ）
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An indication of how long a sunscreen remains effective when applied to the skin.
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sun protection factor
When choosing a sunscreen, always check the sun protection factor so you know how long it will remain effective on your skin.
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When choosing a sunscreen, always check the sun protection factor so you know how long it will remain effective on your skin.
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