Bodyguard Has Designed N95 Anti-Pollution Face Mask To Provide Reliable Respiratory Protection. It Employs Six Layers Of High-Quality Filters To Effectively Protect You From Dust, Odour, Pollen, Toxins And Pm2.5 Particles. Why Use Bodyguard Anti-Pollution Face Mask? • Filters Pm2.5 Particles • Easy To Wear • Washable/ Reusable • N95 Effective Filtration • Comfortable Fit Indications For Use: 1. Store Between -10ºc To +35ºc 2. Replace If Damaged Or Soiled 3. Stop Use If You Have A Hypersensitive Reaction 4. Washable (Once) After 120 Hours Of Usage Layer-Wise Specification Of The Filter 1St Layer - Cotton Cloth To Provide Protection From Heavy Dust Particles 2Nd Layer - Activated Carbon To Protect From Smog, Vocs And Hazardous Gases 3Rd & 4Th Layers - High-Grade Melt-Blown To Filter Pm 2.5 Pollution Particulates 5Th Layer - Nonwoven Fabric To Absorb Unwanted Moisture & Provide Fresh Air 6Th Layer - Soft Cotton Cloth Layer For A Comfortable Fit .