Provides a minimum of 99% filter efficiency against solid and non-oil based aerosol particulates for excellent worker protection. Features the Moldex Dura-Mesh® shell, which resists collapsing in heat and humidity. Flame retardants are added to help decrease flammability of the shell. The soft foam nose flange of the molded nose bridge seals easily and comfortably without a metal noseband. The naturally contoured face piece relieves pressure points. Softspun® lining gives the respirator added comfort and durability. An exhalation valve reduces hot air build-up and keeps worker cooler. Work applications include welding, soldering and brazing along with grinding, sanding, bagging and other hot, humid and dusty environments. NIOSH Approved. 10 per bag. 6 bags per case. Mfg. #2310N99. Sold by the bag.