The Moldex Airwave M Series N95 mask provides larger surface area with the patented wave design for more air flows in and out of the mask. NIOSH approved 95% efficient against solid and liquid particulates, excluding oil based particulates. The unique FlexFit® design moves with your face for comfort all day long. The exclusive Dura-Mesh shell protects the filter media and resists collapsing in hot, humid environments so the respirator holds its shape longer. This results in fewer respirators used and lower costs.