NIOSH approved for at least 99.97% percent filtration efficiency against certain non-oil based particlesCompatible with a variety of protective eyewear and hearing protectionAdjustable noseclip reduces potential for eyewear fogging3M Cool Flow Exhalation Valve reduces heat build-up inside the respiratorAdvanced Electrostatic Media is designed for ease of breathingCool FlowValve reduces heat, moisture and foggingN100Adjustable StrapsFace sealM Shaped nose clip for comfort