Our VERIFY team is taking a closer look at the difference between SPF vs. UPF...
Sunscreen and some cosmetic items are labeled with their SPF rating, or Sun Protection Factor. Some clothing items are labeled with their UPF rating, or Ultraviolet Protection Factor.
The main difference between SPF and UPF is that SPF is a rating for sunscreens and measures how long the product offers protection, while UPF is a rating for clothing that measures how much of the sun’s rays the product blocks.
The SPF on the label of a bottle of sunscreen tells you how much longer it would take the sun’s UVB rays to burn your skin compared to unprotected skin when exposed in the same conditions, the Skin Cancer Foundation says. So if you apply an SPF 30 sunscreen it should take 30 times longer for you to get a sunburn than without any protection.
SPF is based on how much solar energy — or UV radiation — your skin absorbs, the Food and Drug Administration (FDA) says. That means how long you’re protected also depends on factors like the intensity of the sun’s rays and where you are relative to the Earth’s equator.
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