SPERIAN 20pk N95 PARTICULATE RESPIRATOR & SURGICAL MASK. ONE-FIT N95. NIOSH approved. 20 Latex free. Dual strap, flat fold indivdually sealed masks in a dispenser box. Bacterial filtration efficient. fluid resistant. conforms to ASTM F1862, 160 nnHg. Meets CDC guidelines for M tuberculosis. Made in France. the One-fit HC-NB295F particle respirator and surgical mask is a class N95 Disposable mask designed to provide filter efficiency of 95% or greater against particulate aerosols free of oil.