3M Particulate Welding Respirator 3M8511, N95 is uniquely designed to help provide protection against certain non-oil based particles. These industrial masks feature the 3M Cool Flow Exhalation Valve, braided headbands, soft inner materials, and adjustable M-nose clip to help provide a custom fit and secure seal. These N95 machining respirators are ideally suited for work settings that involve heat, humidity or long periods of wear, such as: bagging, drilling, grinding, machining, sanding, sawing, processing of minerals and grain handling. 10 per dispenser.