... : Non-woven highly efficient low resistance 3 Ply High Filtration Dust Mask-Soft, lightweight-Hygienic, Non-irritating to skin, Odorless, and Easier ... -Applications: Suited to many kinds of dangerous workplaces such as mining, building, grinding drugs, casting, agriculture, farming, electronic, food processing, ... heavy metal pollution, gardening, glass industry and etc. High Filtration Dust Mask