High Filtration Capacity 5 Layered FFP2 Medical Particulate Mask, CE Approved, Anti Pollution Mask. Effective filtration to prevent particulate matter PM10, PM2.5, Smaller Particles & Airborne Viruses. Can be used as anti-pollution or everyday use safety mask. Use KN95 masks everyday - more effective protection than cloth masks or disposable masks. Can be reused for upto 40 hours (over a month at 1 hour per day).