Use it to prevent inhalation of rubber dust, brass dust, stainless steel dust and sandpaper dust, an additional help to the fan that blows from behind but still dust in the air. Works for a rubber company, cleaning parts for oilfield products. Also used to mow my morning to prevent inhaling dust and particles. They were washed and dried. Still lies well and doesn't fray at the edges or fade. I didn't want to spend a lot of money on something that might not work. Very happy with the purchase and ordered a larger selection to share with colleagues who will use them when mowing and eating weed for allergies. Does a great job keeping me from inhaling all the dust. Many Thanks.
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