When I was doing experiments in the lab, I worked in a 3M 7500 series mask. I worked for many months, from morning to evening. There were no problems. Worked in sizes M and L. Both were comfortable enough. At home, I also have a cheap orange mask from a hardware store (with anti-paint filters), which I worked without problems for several hours. Now about this "product" from the 6000 series (size M): The mask is really noticeably smaller than it should be. It is very light (especially with 6035 P3 filters). There is a smell, but not strong, and I do not consider this a problem. The problem is with the nose. The "triangle" on the nose is _very_ narrow and presses hard. It presses from the sides and just perpendicular to the face. I adjusted the tension of all the straps - everything is not right. If the mask is moved lower, then the exhalation begins to blow on the bridge of the nose or eyes. If higher, then the "triangle" pokes at the bridge of the nose and forehead. The fit of this mask is significantly worse than that of a cheap mask from a hardware store. Wouldn't recommend, especially for men. Either take the 7000 series, or look for alternatives from other manufacturers. This mask in size M may be suitable for people with small and narrow noses. With "normal" and especially wide noses - do not even try. Men - only size L! Unlike the construction mask, there is still a strap at the bottom, which presses the bottom of the mask to the chin. But again, all the tension of even the lower strap is transferred to the nose.
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