ＵＰＦ

noun

Ultraviolet Protection Factor; UPF

Technical term used in clothing and textile contexts to indicate how much UV radiation a fabric blocks.

• このシャツはＵＰＦ５０＋で、紫し外がい線せんをしっかりカットします。

  This shirt has UPF 50+ and effectively blocks UV rays.