SPERIAN ONE-FIT NBW95 AND NBW95V PARTICULATE RESPIRATORS are the latest NIOSH approved, N95 molded-cup style filtering respirators from Sperian Protection. As a universal, one-size respirator, both the NBW95 and the NBW95V (with exhalation valve) are designed to fit most face shapes and sizes while providing outstanding respiratory protection. Designed to be an economical choice for effective single-use respiratory protection. 95% filtration efficiency against solid particulates and non-petroleum based liquid aerosols.