Description: Material of The Protective Filter: Outer layer: spun bond non-woven fabric, anti-foam design; Middle layer: melt blown cloth, with the function of filtering fine particles; Inner layer: spun bond non-woven fabric, with the moisture absorption. Specification: Product Type: Silicone Face Mask Product Material: Food Grade silicone, Non-woven fabric, Melt blown fabric Standard: GB2626-2006 Product Guarantee: 2 years Filtration Rate: ≥ 95% (0.075μm particles) Mask Mass Air Flow: 85L / min Aerosol-concentration: 15 mg / m and sup3 Inhalation Resistance (Pa): ≤ 350 (GB 2626-2006 6.5) Expiratory Resistance (Pa): ≤ 250 ( GB 2626-2006 6.6) Package Size: 25x18x5cm Package Weight: 58g Packing List: 1x Silicone Face Mask + 2pcs PP Bracket + 10pcs Non-woven Filter1x 10pcs Non-Woven Filter (option)