These masks are intended to be used for protection against solid and liquid aerosols in wood, cement, glass working, textile, mining and construction environments. They are extremely durable, and they have a soft inner surface with an adjustable nosepiece and a secured headstraps for a proper fit. There is a low breathing resistance for increased workering comfort. All FFP1 masks are to be used in situations up to 4 times the Occupational Exposure Level (OEL).