Moldex 2300N95 disposable particulate respirator with exhalation valve. N95 rated to protect against particulate aerosols free of oil. This is a good choice for hot, humid and dusty environments such as welding, soldering and brazing, grinding, sanding, sweeping, bagging, stone quarrying, metal machining, cement, underground mining, polishing, buffing, lime, poultry and textiles. 10 mask per box