3 ply face mask 1.with ce and iso approved. 2.material: non woven,unique surface water resistance and soft lining. 3.common size:17.5Ã?9.5cm. 4.adjustable nose piece for easy use. 5.style:tie-on or ear-loop. 6.application: mainly used in hospital,medical factory and food industry. 7.breathing resistance (delta p)99% ,particle filtration efficiency(bfe%)>99%. 11. Resistance to penetration by synthetic blood-160mmhg.
