8world, 狮城有约 | PM2.5可进入血液？教你看懂烟霾戴对口罩

(Summarised translation)

SUTD Senior Lecturer Teo Tee Hui explained that cloth masks filter about 10% to 30% of PM2.5 particles, while ordinary medical masks filter about 30% to 60%. N95 masks, in comparison, can filter at least 95% of fine particles.

He noted that N95 masks have multiple filtration layers, including an electrostatically charged non-woven layer that captures tiny particles. He also highlighted other mask standards available on the market, such as FFP2 and KN95, and advised consumers to check certification labels when purchasing masks.