5 Layer Filtration System ( 3 Spun Bonded , 2 Melt Blown Layers ) Anti Bacterial | Anti Dust | Anti Pollution -Collapsible, Foldable and Pocket Friendly Design -Easy to wear, Comfortable and Universal Fit -Soft Lining with an Adjustable Nose pin -No disruption while speaking and breathing -ISO 9001, ISO 13485, CE Certified -Sitra Approved -ASTM F 1862, F 2101, F 2299 and IS 16289 -DRDO Approved