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Use for dusty operations including grinding, sanding, sweeping. NIOSH certified to have 95% filter efficiency at removing solid and liquid particles (excluding oil). Includes Cool Flow Exhalation Valve that offers cool, dry comfort. Adjust the M-Nose clip with fewer pressure points and greater comfort. Comfort and durability along with increased wear time.
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Good Masks
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These masks look good and appear to be well made (being an M3 product and all). I purchased them to put in a emergency/earthquake kit. They are packed all in one plastic bag (rather than individually) inside a box. I would recommend this as a good, inexpensive mask/respirator.
Rating: 
(5
out of 5) @ 2008-11-03
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SoCal wildfire protection
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I bought this 10 pack to get ready for the next wildfire season in San Diego. The box got split up for my extended family to have ready. The smoke in the air is terrible during those few days a year when we are faced with burning all around us. It's good to know we have them ready at hand.
I love the ease of use, especially the nose piece that can be pressed to confirm to your face. It is very comfortable and hightly recommended.
Rating: 
(4
out of 5) @ 2008-02-15
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3M 8511
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This respirator did a good job of reducing construction dust (tear-out, sawing, etc.). It didn't fog up my safety glasses like similar products and I didn't get dust in my nose and throat.
Rating:
(4
out of 5) @ 2007-10-01
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Duster
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The blow off duster arrived prom ply and shall be put to giid use to chase the dust bunnies out of my computer.
Rating:
(5
out of 5) @ 2007-09-01
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An excellent basic respirator
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This respirator is better because of the one-way ventilation valve in the front, which keeps your exhalations from coming out and fogging up your glasses. Also, the elastic is much more durable than the really cheap masks.
Rating:
(5
out of 5) @ 2007-07-18
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