... 3,BEF90%~99% 3-ply face mask with filter1, 17.5*9.5cm,2, 3-ply, nonwoven face mask or with the isolation layer ... (melt-blown fabric) .3, we produce in ... in making various healthcare and medical supplies. Quality consistent with the ISO9001, ISO13485, CE standards and China State ... 's begin the win-win cooperation! 3-ply face mask with filter