KN95 mask is a 5-layered mask that can effectively filter 95% of fine particles. Layer 1: Outer soft and comfortable non-woven material Layer 2: ES (Ethylene-Propylene side by side) Layer 3 and 4: PP melt-blown Layer 5: Inner soft and comfortable non-woven material Certification: CE, FDA (EUA listed) For general public use. Note: FREE AIR SHIPPING INCLUDED Price Includes: Free air shipping to 1 continental United States location