The Dentec Comfort Air Nx is a reusable elastomeric respirator without an exhalation valve. The product comes in two forms - the Comfort Air Nx, designed for general purpose usage, and the Comfort Air NxMD, designed for usage in healthcare settings. The Comfort Air Nx is one of the first NIOSH-approved respirators without an exhalation valve.
The Comfort Air Nx model has a black facepiece and black N95 cartridges, while the NxMD model is white and has white N95 cartridges. Both models come in small/medium and medium/large sizes (see sizing information). Each model is available in an N95 cartridge and P100 form, and each of these configurations have been NIOSH-approved.