標題: The Best KN95 Masks Of 2023, According To Experts [打印本頁] 作者: MadeleineT 時間: 2024-12-6 18:50 標題: The Best KN95 Masks Of 2023, According To Experts 2. N95 masks have slightly stricter requirements for pressure drop while inhaling. Wearing a mask is one way to reduce the spread of COVID-19.