The 3M 8511 N95 Dust Mask, Particulate Respirator with Exhalation Valve is the economical choice for light duty or short duration applications. Patented filter media with advanced electrostatically charged microfibers help make breathing easier and cooler for enhanced user comfort. Protects you against dusts, fumes, microorganisms, and non-oil containing mists better then the average dust mask. 10 per box.