The Workhorse Disposable Dust Mask offers relief from the bothersome effects of common nuisance dusts and pollen. This dust mask is high quality and lightweight 0.01lb providing greater comfort while doing dusty jobs. Its adjustable metal nosepiece allows for a custom comfort standard fit - 4.5"x5.5" one size fits most, that helps keep out irritating debris during jobs and yardwork. This dust mask is to be used against non-toxic, non-harmful dust only. Ideal for grinding, sanding, sweeping, gardening, for the home workshop and other dusty operations. Designed for removal of non-toxic dusts such as pollen and household allergens. Easy breathing due to low resistance on inhalation and exhalation. Comfortable shape with easy-breathing design