This 3M high efficiency disposable respirator is a HEPA particulate filter to guard against dusts and mists during fingerprint powder or chemical processing. This mask may be used multiple times, as long as there is no damage or contamination to the mask. Fits a wide range of facial sizes and provides a comfortable fit. Features include an adjustable contoured nose piece and a foam face seal for a secure fit. Exhalation valve reduces moisture and heat buildup inside the mask. This is the ideal disposable mask for fingerprint powder processing or evidence collection. Packaged individually or in a case of 20 respirators. NIOSH approved N100 with highest possible filtration rating.