WITH ISO , CE AND ATIRA CERTIFIED 5 LAYERED LAYER-1= 60 GSM NON WOVEN FABRIC (ISOLATION OF LARGE PARTICULES) LAYER-2= 25 GSM MELT BLOWN FABRIC (GOOD AIR PERMIABILITY) LAYER-3= 25 GSM MELT BLOWN FABRIC (FILTRATION OF SMALLER PARTICULES) LAYER-4= 25 GSM MELT BLOWN FABRIC (HIGH DENSITY FILTER LAYER) LAYER-5= 30 GSM SKIN FRIENDLY NON WOVEN ( SOFT , COMFY )