Venus V-Shwas N95 Respirator (mask) approved by NIOSH with filtering efficiency - > 95% solid particles. Textile tubular elastic fitting for Long life & does not deform in high temperature. Has a high tensile strength adjustable aluminum inside nose clip for better fit. Unique adjustable beads to adjust the fit of the mask on face. High technology filter media with micro fine fibers & electrostatic charge that can protect against solids & liquid aerosol particles Easy to store with universal fold flat style filtering design with large face coverage & lightweight construction. Dotted pattern edges for a soft feel when worn & skin friendly. Elastic Welded outside the filter area for No leakage & No puncture on filter. WHEN TO REPLACE Remember to change your mask if you observe any of the following : - Dirt accumulation on mask & difficulty in breathe - Foul smell from mask after multiple use - Damage of mask & elastics PRODUCT INFO VENUS V-4400 M.U.L.: Upto 4 x OEL 6 ITEM# COLOR ELASTIC STANDARD CLASS PROTECTION 14537 White Welded N95 Non Oil based particles 14188 White Welded N95 Non Oil based particles