Size: MediumHalf-Face DesignReusable Respirator Offers Reliable And Convenient Respiratory Protection And Is Suitable For Many Situations When Using The Right Cartridges Or FiltersComfortable Soft, Lightweight Facepiece With Easy To Adjust Head StrapsCan Be Disassembled, Cleaned And ReusedReplaceable Cartridges And Filters Allow Reuse Of Facepiece For Cost SavingsNIOSH Approved For Negative Pressure Air Purifying And Supplied Air Dual Airline Applications