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What’s the Difference Between SPF and UPF?

Did you know there’s a difference between SPF and UPF? Both have something to do with keeping your skin protected from the sun but mean very different things. Sunlight includes rays of invisible ultraviolet (UV) radiation; overexposure to UV rays can lead to sunburn, accelerated skin aging and skin cancer. Sun protective clothing and sunscreen offer your main forms of UV protection but are rated two different ways with SPF and UPF.

UPF is the standard used to measure the effectiveness of sun protective fabrics. UPF stands for “Ultraviolet Protection Factor” and indicates how much of the sun’s UV radiation penetrates a fabric and reaches the skin. UPF is associated with fabric and you will see a UPF rating from 15-50 associated with products that claim that they are sun protective. A fabric with a rating of 50 will allow only 1/50th of the sun’s UV rays to pass through. This means the fabric will reduce your skin’s UV radiation exposure significantly because only 2 percent of the UV rays will get through. This also means that it blocks both UVA and UVB rays while SPF only takes the UVB rays into account.

SPF is a standard used to measure the effectiveness of sunscreen. SPF stands for “Sun Protection Factor”. It measures the amount of time it takes for sun-exposed skin to redden, while UPF measures the amount of UV radiation that penetrates a fabric and reaches the skin. Remember that SPF only accounts for UVB rays unless specifically stated as a broad-spectrum sunscreen.

Here is a visual breakdown of the two compared to each other.

As you can see when you are trying to keep your skin protected it is important to know the different rating systems. Many skin-care experts believe clothing shields skin more effectively from UV light than sunscreen. Many of us often apply sunscreen lotions too thinly, giving our skin less protection than the sunscreen’s available SPF rating, and we neglect to reapply it as directed by the specific sunscreen that we use.

To receive The Skin Cancer Foundation’s Seal of Recommendation, sun-protective fabrics must have a minimum UPF of 30. They consider a UPF rating of 30-49 to offer very good protection and 50+ excellent protection. Coolibar was the first clothing brand to receive the Skin Cancer Foundation’s Seal of Recommendation. All of our clothing is rated UPF 50+, with protection that will never wash out.

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Concluding African American History Month – Or Not

All this month we’ve been reminding people that African Americans (and others with naturally dark skin) can get skin cancer, too. And, as African American History Month concludes, we at Coolibar would like to ensure that the flow of information about cancer and skin of color does not.

Skin cancer – particularly melanoma – has been shown to be much deadlier to African Americans than for Caucasians. The Skin Cancer Foundation points out that 52 percent of non-Hispanic black patients receive an initial diagnosis of advanced stage melanoma, compared to 16 percent of non-Hispanic white patients.

There are several reasons for this, including that squamous cell carcinoma (SCC), the most common skin cancer in African Americans, tends to be more aggressive and can carry up to a 40% chance of spreading.

But many of us also still believe that African American skin, with its higher melanin content, is just highly resistant to developing cancer caused by the sun. African Americans simply tend to seek treatment much later because skin cancer isn’t top of mind.

In fact, typical African American skin protects at the equivalent of a 13.4 SPF sunscreen. (SPF stands for Sun Protection Factor, and it mostly measures UVB radiation that causes darkening or burning on the surface of the skin). UPF, or Ultraviolet Protection Factor, measures UVB and UVA radiation. UVA penetrates deeply into the skin and is, by far, the most prevalent of the sun’s radiation.

Effective sun protection starts at UPF 30, and should ideally be UPF 50 or higher.

There is more to be repeated, remembered and learned; for example, the Skin Cancer Foundation has some excellent facts about ethnicity and the dangers of the sun.

African American History Month may come to an end. But the effort to defeat skin cancer continues year round!

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