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2. Neck gaiter - Wikipedia

   en.wikipedia.org/wiki/Neck_gaiter

   A basic neck gaiter (red), a balaclava (blue/black), and a multifunction neck tube (multicolor). A thick hood with attached neck gaiter. A neck gaiter, dickie or neck warmer is a neckwear, or an enlarged collar of a garment, that is worn around the neck for warmth.

3. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   mouth-bit respirators, which fit in the mouth with the nose pinched shut (escape only) quarter-mask or orinasal mask, covering the mouth and nose only; half-mask, from below the eyes to below the chin; fullface mask, from above the eyes to below the chin; Some elastomeric masks include one-way valves to let exhaled air out unfiltered.

4. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   A surgical mask is a loosely-placed, unsealed barrier, meant to stop droplets, and other liquid-borne particles from the mouth and nose that may contain pathogens. [48] A surgical mask may not block all particles, due to the lack of fit between the surface of the face mask and the face. [48]

5. Non-invasive ventilation - Wikipedia

   en.wikipedia.org/wiki/Non-invasive_ventilation

   Non-invasive ventilation (NIV) is the use of breathing support administered through a face mask, nasal mask, or a helmet.Air, usually with added oxygen, is given through the mask under positive pressure; generally the amount of pressure is alternated depending on whether someone is breathing in or out.

6. Non-rebreather mask - Wikipedia

   en.wikipedia.org/wiki/Non-rebreather_mask

   Non-rebreather mask covering a woman's nose and mouth. The non-rebreather mask covers both the nose and mouth of the patient and attaches with the use of an elastic cord around the patient's head. The NRB has an attached reservoir bag, typically one liter, that connects to an external oxygen tank or bulk oxygen supply system.

7. Self-contained breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Self-contained_breathing...

   An open circuit SCBA typically has three main components: a high-pressure gas storage cylinder, (e.g., 2,216 to 5,500 psi (15,280 to 37,920 kPa), about 150 to 374 atmospheres), a pressure regulator, and a respiratory interface, which may be a mouthpiece, half mask or full-face mask, assembled and mounted on a framed carrying harness.