![]() (They are latex-free, according to 3M.) The exhalation valve works as a dehumidifier, keeping your face cooler and lessening the chance of fogging up glasses. Whereas other disposable respirators have loosely stapled rubber bands for straps, the 3M 8511 has sturdier, woven straps that are less likely to snap or to catch in your hair. It sealed well against a wide range of face shapes and sizes among our testers, who ranged from 5′3″ to 6′1″ with light to heavy builds. In our testing, it stood out as the most comfortable respirator mask for long-term wear, as its design gave us space to breathe and had edges that didn’t push against our cheeks. Thanks to increased production, it’s widely available online and in stores. Like other N95 masks, the 3M 8511 N95 Cool Flow Valve Particulate Respirator is certified to filter out 95% of harmful particulate matter.
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