Dust mask with replaceable filter for use when routing for industrial and construction work diy and various other trades five times larger surface area than the average disposable dust mask giving superior protection against dust inhalation and offering considerable cost savings the one way exhaust valve vents to the underneathpreventing exhaled air from fogging goggles or the optional visor this also ensures that the filter stays dry reducing filter clogging and prolonging its life p2 electrost