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. This mask is designed with low breathing resistance filter media to increase user comfort. All KS2 masks are to be used in situations up to 4 times the Occupational Exposure Level (OEL).