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2. 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.

3. Full-face diving mask - Wikipedia

   en.wikipedia.org/wiki/Full-face_diving_mask

   A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]

4. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   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. [74]

5. What to look for when buying a clear face mask, according to ...

   www.aol.com/lifestyle/2020-08-27-what-to-look...

   At just $14 for five masks, the budget-friendly set is an easy way to give clear face masks a try. For more stories like this, check out: Hundreds of TODAY readers have purchased this celebrity ...

6. Diving mask - Wikipedia

   en.wikipedia.org/wiki/Diving_mask

   A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. [ 1 ] [ 2 ] Surface supplied divers usually use a full face mask or diving helmet , but in some systems the half mask may be used. [ 2 ]

7. Snorkel (swimming) - Wikipedia

   en.wikipedia.org/wiki/Snorkel_(swimming)

   The integrated snorkel mask may be a half-mask, which encloses the eyes and nose but excludes the mouth, or a full-face snorkel mask, which covers the eyes, nose, and mouth. Early designs of snorkel-mask typically comprised a tube for breathing with an immersion-activated shut-off valve at the top, and the bottom opening into the mask, which ...