... or cleaning activities, such as dusts from drywall, concrete, wood, fiberglass, silica (from ceramic or glass production ... ), or sweeping. More-Safe's Disposable Dust Mask: * earloop,easy to wear * nonwoven material * ... medicine, disintegration projects, cement, agriculture and animal husbandry, cutting dust, pollutes from heavy metal. More Details: * Packing: 50PCS ...