50 pieces adults disposable reusable anti-haze mouth mask dustproof masks

non-woven cloth material, soft and breathable, provides an effective protect, comfortable to wear. formed with non-woven, melt blown fabric and filter cloth layer to prevent 95% of dust, haze, allergies, smoke, pollution, particulates, etc. with a built-in hidden bridge, can be adjusted to avoid fog and reduce the inhalation of harmful substances. suitable for household, public places, office, outdoor sports, construction site, carving grinding work, etc.