Meeting the international quality criteria(Europe):EN149:2001 FFP1 * Made with multi-layered nonpoisonous, non-allergic, non-stimulating materials. * Adjust the bandage strip and the built-in bandage foam cushion to adapt to various face-shapes with comfortable sealing. * The high-efficient and strong electrostatic filtering materials effectively filter the solid particle dust, and prevent the oil liquid gas. * Use for construction, mining, textile, grinding medicine, disintegration projects, agriculture and animal husbandry, cutting dust, pollutes from heavy metal. According to your requirement.