Adjustable nosepiece and inner form provide a customer seal for different facial sizes. Easy-breathing exhalation valve with silicon piece inside designed to facilitate air exchange, increase worker comfort. Special 3-ply pleated design, high filtration and static electricity material to resist normal toxic and ting micron particle. Suitable to mining, building, grinding drugs, casting, agriculture, farming, electronic, food processing, cement textile, disintegration, carving, heavy metal pollution, gardening, glass etc workshops.
