It is widely used in medical-health departments, food industry and personal health, particularly for cement factories, food powder factories and textile factories for personal protection against air pollution. This mask also has best effect for protection wind. Made with spunbonded polypropylene Provides maximum beard and mustache coverage Elastic headbands ensure snug fit and minimize coverage slippage Naturally contoured shape for comfort. Metal nosepiece adjusts to accommodate most facial sizes. Fits comfortably with eyewear. Large filter area allows for cool, easy breathing. WARNING: This mask is not NIOSH Approved. It will not protect you from toxic or hazardous dusts. Performance of Dust Mask: Dusk removing efficiency: 95% Pressure drop of inhale: ≤2.5P(mm water) Pressure drop of inhale: ≤1.5P(mm water) Dead room: 180cm3 Hindrance on visual angle: ≤3 degree Material: PP Meltblown Specification: 100g, 120g, 140g, 160g, 180g, 200g, 220g, 240g Packing: A. 50pcs/inner box, 1,000pcs/ctn B. 50pcs/polybag, 2,000pcs/ctn C. 5pcs/polybag with hanging card, 600pcs/ctn