This 3M respirator's Advanced Electret Filter Media traps small particles and makes breathing easier and more comfortable. Use for dusts from handling dry fertilizer in livestock barns and shelters, for haying, grinding feeds, combining and baling. Soft seal conforms closely to face. This respirator is not resistant to oils. N95 rating. Box of 10. Certified under NIOSH 42CFR84. Approval No. TC-84A-1299. USA made.