Non Woven n95 mask: 1) Material: nonwoven+filter+neele punched; ... Silicone Respirator / Reusable / DisposableSuited to mining ,buildings,casting,grinding drugs,agriculture,gardening,forestry,livestock husbandry,subway engineering,aluminum working ... mill,hardware factory ,metal burnishing,polishing and cutting,disintegration engineering,smashing,etc. disposable non woven cloth dust mask n95 standard