1. Outer layer is 60 GSM Spun Bond (100% Polypropylene) Hydrophobic Material, 2. Layers of 25 GSM Melt blown Filter 3. Layers of 25 GSM Melt blown Filter 4. Layer is 60 GSM Hot Air through Non-Woven Fabric 5. Inner Layer is 30 GSM Spun Bond (100% Polypropylene) Hydrophilic Material