5 Layer construction (non-woven fabric + fusing fabric + melt blown + meltblown + lint free non woven fabric).
Protect against dust, smoke and microbes.
Not suitable for harmful gasses.
Adjustable nose clip, convenient to use.
Light weight design, soft and comfortable to wear and breathable.
Moisture-proof, non-toxic, non-irritating, 94% filtration at least.
Comfortable nose foam, ultrasonically welded earbands.