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person laying in the sun wearing the stillwater upf50+ full brim hat

Does my hat protect from sun Sun protective hat Sun protective running hat Upf 50 hat Upf rating clothing Upf vs spf clothing What is upf

What UPF Actually Means

You've seen UPF on hat tags and product pages. Maybe you've wondered what it actually means - or whether it means anything at all. It means something. And if you spend real time outside, it's...