“UVA可以穿透大部分织物”？ 吓得赶紧去搜了一下… 还真是。以后户外要更小心

 

 

“UV rays can pass through thin, light-colored, and loosely woven fabrics. For optimum protection, wear tightly woven, dark-colored, long-sleeved shirts and pants, as well as wide-brimmed hats. Certain types of fibers also provide more protection than others. "

https://www.healthline.com/health/skin-cancer-protection/sun-protective-clothing#:~:text=UV%20rays%20can%20pass%20through,provide%20more%20protection%20than%20others.

 

Be aware that covering up doesn't block out all UV rays. If you can see light through a fabric, UV rays can get through, too. "

https://www.cancer.org/healthy/be-safe-in-sun/uv-protection.html