The Dust Mask provides relief from irritation of non-toxic nuisance dust. Effective against pollen common household dust and other non-toxic particles.Well balanced Half Mask manufactured from durable and flexible thermoplastic rubber. Dual bayonet filter connection provides better weight balance and a wider field of vision. Ergonomically designed head harness reduces pressure and provides maximum wearer comfort. ABS filter holders with frontal exhalation valve. Filters sold separately.