Non Woven n95 mask: 1) Material: nonwoven+filter+neele punched; 2) Layer ... grinding drugs,agriculture,gardening,forestry,livestock husbandry,subway engineering,aluminum working,electronic and electrical appliances manufactureing industry,meter and instrument ... factory ,metal burnishing,polishing and cutting,disintegration engineering,smashing,etc. disposable non woven cloth dust mask n95 standard