The One-Fit 20 PacK respirator mask is a class N956 disposable mask design to provide filter efficiency of 95% or greater against particulate aerosols free of oil. The respirator provides greater than 99% Bacterial Filtration Efficiency (BFE) against micro-organisms generated by a wearer and meets. It is latex free and fluid resistant. Each respirator comes sealed in a polybag and packaged in an 11" x 3.75" x 3.75" box.