• pingveno@lemmy.ml
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    1 year ago

    Many materials like cotton will let sunlight through quite readily, especially when thin or wet. A sun hoodie has 50+ UPF. A cotton shirt that has a similar low thickness will have a mere 5 UPF, making it basically worthless for sun protection. Sun hoodies also often sport features like vents to catch breezes.

    • Pyrrhichios@feddit.uk
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      1 year ago

      Interesting! I’ve never burned though a shirt but perhaps I’ve been lucky. Maybe I do need to invest in one of these…

      • pingveno@lemmy.ml
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        1 year ago

        It might just depend on the UV index where you’ve been outside. If you’re in a high latitude area, you’re not going to have that much exposure through all but the thinnest of cloth.