Product Name: MSA/Mei Si An 10147997 3100 Series Single Filter Cartridge Full Facepiece Product Features: Brand: MSA/Mei Si An Model: 10147997 Name: Dual Filter Cartridge Full Facepiece, MSA/Mei Si An Single Filter Cartridge Full Facepiece Anti-Poison, Mei Si An 10148001 Full Facepiece Anti-Poison, 3100 Series Rubber Full Facepiece Advantage 200 LS Full-Facepiece Respirator. Features an inner mask design to prevent fogging. Low breathing resistance, lightweight, anti-scratch coating on the facepiece, wide field of vision, easy-to-adjust head straps, polycarbonate lens with anti-scratch coating, sturdy and stable, no visual distortion; used with RD40 filter canister, equipped with exhalation and inhalation valves to reduce breathing resistance and ensure comfortable use.