No. of layers : 3 Outer Layer : 20GSM Non-Woven Spun Bond Fabric, Color : Blue Middle Layer : 25GSM MeltBlown Filter, Color : White Inner Layer : 25GSM Non-Woven Spun Bond Fabric, Color : White Ear Loop : Ultrasound welded Round Ear loop, Color : White Nose Wire : Adjustable Nose Wire Size : 17.5 cm X 9.5 cm Filtration Capacity : â?¥99.4% BFE (Bacterial Filtration Efficiency) Particle Filtration Efficiency : â?¥99% Aerosol Size : 3.0 �¼m Breathing Resistance < = 5 Splash Resistant Standard : SITRA, CE and ISO Certified