The AgBoss P2 Cup Valved Face Mask filters out the fine particles in the air when worn correctly. The addition of an activated carbon layer helps to reduce odour penetration. They form a tight seal around the face and reduce the exposure to smoke/poor air quality and associated health effects. The exhalation valve offers comfortable breathing, especially under hot or humid conditions. This mask is suited for agriculture, farming, food processing, cement textile, gardening, dust, smoke, fumes, blasting, grinding & sanding to name a few.