"Removes up to 99.7% of unwanted particles. Comfortable respirator with N100 rating filters particles larger than .3 microns. U.S.A. Respirator Type: Disposable, NIOSH Approved: Yes, Filter Rating: N100, Exhalation Valve: Yes, Adjustable Strap: Yes, Filter Included: N/A, Masks Included (qty.): 1"
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