This Moldex 2310 Premium Particulate Respirator is N99 for a higher level of filter efficiency against particulate aerosols with no oils present. The N99 respirator is ideal for welding, soldering, brazing, torch cutting and metal pouring, as well as very dusty processes including polishing, buffing, textiles. This respirator is not suitable for environments with oil present. The N99 Premium respirator is designed with Moldex’s exclusive DuraMesh shell which keeps the filter cleaner so it lasts longer, saving on costs. The Softspun lining cushions the face for comfort that lasts all day long.