I work in law enforcement and often have to wear a mask so I've seen these masks with a blue line, the size is accurate right For me, in order not to constrict my ears, I will say that XLarge would be a loss for smaller people. I'm a medium height male, 6ft, 225lbs and it's not tight. Made in China. Comes in a sealed plastic bag with card, no chinese written in english they seem to be well made except one of my straps has an over ear view which can make it awkward they have a pocket to put a filter in if necessary, time will tell if they hold up
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